A levels computer science

I start A levels in September in the uk after completing my igcse abroad. I'll be taking Comp Sci, Business, and Economics. Could I get into a good uni with these 3 combined or am I a lost cause? Also, I didn't take Economics in my early years of high school. Is taking it now a bad idea, or do I have enough to time to get the hang of it if I clutch?

No that’s a great combo, although be aware that when applying for certain Uni courses you might not be able to apply without Maths A level (some may accept Economics as a substitute). Many schools in England don’t even offer Econ as a subject below A levels so you’re good there. I don’t take econ my self but I know from people that do that quite a few people dropped it in the first few weeks, not because of difficulty but because it was less maths and more graphs and policies then they expected. Definitely start thinking about what courses you want to do for uni now so that if it requires a specific A level you still have time to change

I wouldn't advise taking Business and Economics as there is too much overlap, some unis don't like it. We don't let our students take both because of this.

It's not a good idea to take BS and Econ.

I took 8 subjects at IGCSE
ENGLISH (A*)
HISTORY (B)
BUSINESS (B)
PHYSICS (C)
BIOLOGY (D)
MATH (C)
ICT (A)
Geography (B)
I didn't write Comp Sci at IGCSE level, but I took the classes and the college said it was okay.
I'm not that confident about taking any of the sciences, or math, cause it was never really my strong suit. What would you suggest I took as my third to replace economics?

What are you thinking of taking at university?

As silly as it may sound I'm still a bit unsure, but I want to do something IT related or business on the marketing end of things

No, it's fine not to know but it might influence a choice of A level. It might be worth looking at a few unis to check requirements.
An essay subject? English, Psychology, Geog or History? Which subjects do you enjoy

Geography and History were quite enjoyable for me