TL;DR: I want to switch from a-level maths to a-level psychology at the end of this year due to my continued poor perfomance in maths, has this been done before and is it legal?
I have continously done horrible in maths throughout year 12 and my teacher is completely aware of it. In my first round of mocks I had come out with a D in maths. I also do biology and chemistry alongside maths and regularly achieve a's and b's. I want to apply to pharmacy as well which usually have the grade requirements of AAB, so if i end up doing poorly in my actual a-level maths exams it would be a huge issue.
So after completing my second round of mocks recently (i havent gotten my grades back yet), i knew i had done terribly in my maths one. And since the first round of mocks i have worked on maths for so long but i genuinely just dont understand it and EXTREMELY dislike the subject as a whole. So i've been thinking about learning all of the as psychology content during my summer, then perhaps doing a mini-mock on my first week back of year 13. And if i do better in that in comparison to maths, i could join the a-level psychology class. But 1) i have no idea whether this is legal and haven't found out after searching it but and 2) i dont know if anyone has done this before.
I know i'll probably be able to learn all of the psychology content during my summer because it seems extremely interesting to me and it's more memorising which i know i'm very good at.
However, after talking to the head of sixth form at my school, she basically mocked me for it. She said that i'm not even allowed to take psychology independently??? And that it's my fault for picking maths which i know it is but i still have a year left so i want to do something about it. It seems like me trying hard in maths and working on it just isn't working which may also be because of my lack of passion which i have no idea how to magically fix.
I also think that there's no point in me continuing with maths when i'll probably end up with a c or something. AND if i'm finding year 12 content this hard then i'll basically be suffering next year. So i don't know why i should continue with it.