I'd say you have two choices, one is take a gap year get a job for a while and give yourself a break from education as that can help to evaluate your situation and gives you some experience of what the real world and a better perspective on what you're options are and will likely help you make a decision on what you want to major in at college / uni.
Alternatively, just pick any STEM course and do that, I recently graduated from uni with a First Class Honours degree in CompSci, but I work along side people that have degrees and masters in maths and physics that do the same job, as long as you go STEM you'll do fine. I'm working as a developer / technical consultant right now.