How do I stop fantasizing other degrees/subjects?

I'm in year 12 and struggling to deal with anxiety around my degree choice. I've been bouncing around economics, physics, engineering, E and M, PPE and now computer science despite my current clear passion for mathematics. I think this mainly stems from the fact I fear I might hate maths after university and I do like the idea of going into a more specialised maths area. I told myself not to be obsessed with job prospects but I think that's a driving factor for three of these obsessions. I have thought about a joint degree but I don't have a reason other than seemingly impulsive desires. Context about myself: currently studying mathematics, further mathematics, physics and economics; and I have not been exposed to anything computer science-related other than a few basic html coding lessons in y8 and my fm module being dm1. Basically, I don't have much experience with cs and economics yet I keep getting the urge to do it as a degree. Does anyone have any advice with how to quell this?

I'm in year 12 and struggling to deal with anxiety around my degree choice. I've been bouncing around economics, physics, engineering, E and M, PPE and now computer science despite my current clear passion for mathematics. I think this mainly stems from the fact I fear I might hate maths after university and I do like the idea of going into a more specialised maths area. I told myself not to be obsessed with job prospects but I think that's a driving factor for three of these obsessions. I have thought about a joint degree but I don't have a reason other than seemingly impulsive desires. Context about myself: currently studying mathematics, further mathematics, physics and economics; and I have not been exposed to anything computer science-related other than a few basic html coding lessons in y8 and my fm module being dm1. Basically, I don't have much experience with cs and economics yet I keep getting the urge to do it as a degree. Does anyone have any advice with how to quell this?

I'm in year 12 and struggling to deal with anxiety around my degree choice. I've been bouncing around economics, physics, engineering, E and M, PPE and now computer science despite my current clear passion for mathematics. I think this mainly stems from the fact I fear I might hate maths after university and I do like the idea of going into a more specialised maths area. I told myself not to be obsessed with job prospects but I think that's a driving factor for three of these obsessions. I have thought about a joint degree but I don't have a reason other than seemingly impulsive desires. Context about myself: currently studying mathematics, further mathematics, physics and economics; and I have not been exposed to anything computer science-related other than a few basic html coding lessons in y8 and my fm module being dm1. Basically, I don't have much experience with cs and economics yet I keep getting the urge to do it as a degree. Does anyone have any advice with how to quell this?

Have you booked any Open Days yet?
Made a shortlist of of your 'ideal' universities? 😧

Go to open days, reading about the courses, read books about the different subjects you are considering, do online courses. Basically just try and get a feel for what these different courses will feel like, and hopefully you can start to realise which one you might prefer the most.

I would suggest maybe in the spring/summer that you explore some degree level maths e.g. some basic real analysis/"advanced calculus" or (abstract) linear algebra, from a proof based perspective. This might give you a better sense of whether you would get along with the kind of maths in a maths degree (which is very different from A-level - the maths in a physics or engineering course is more similar to the maths you do in A-level).
As for deciding between degrees, start by exploring them in this manner one by one, looking at the actual way those subjects are studied at degree level, and see how it suits you. For physics for example aside from more general "cultural" material from reading e.g. the Feynman lectures, you could also just have a look through Young & Freedman (I'm sure a local library to you has a copy...?) and see how physics at degree level differs from A-level (basically - it uses calculus! Lots of it! Also matrices and complex numbers). Then just continue through in the same manner.
A word about CS - a CS degree is not a degree in programming, and programming is often a relatively small proportion of the course and a means to an end. Also I don't think HTML coding really compares to actually programming with a programming language. You could explore this more by using python or something to try and code some simple programs (Project Euler might be a good place to find some ideas of what to start with, which also relates to your mathematical interests), although again programming is not the be all and end all of a CS degree.
Bear in mind also there is some degree of overlap in these areas; you'll do some level of programming in basically any of those degrees (save maybe economics); you'll continue with some at least basic mathematical methods in calculus, differential equations and linear algebra in all of those areas (with differing emphases); you'll do some level of physics type stuff in all except CS and economics (albeit in a maths degree usually you only have to do a small amount of mechanics mandatorily and it's mostly optional otherwise). Also many of these courses will more or less give you the same career options too. So in that sense it's not surprising to be considering all of them but there are things you can do to figure out which is the best fit for you

Alright, I'll give this a go. Hopefully I do find which one I prefer most.