Economics Degree

Hi! I'm a Y12 taking Maths, Economics, Further Maths, Chemistry and History. I want to go into Economics, but I'm not too sure where to apply I'm not too sure which subject/subjects to drop, could someone help me please?
Reasons for taking:
Maths: required, but very time consuming
F maths: Recommended for LSE and puts me at an advantage, quite hard
Chemistry: In case I don't want to go into Economics, this broadens my options, but it is a very difficult time consuming A level
Economics: Love the subject but my teacher is not very good, he jumps from Theme to Theme and doesn't go in detail (considering to drop as I have to teach myself which takes even more time but then again it is recommended if you want to do Economics for some Unis)
History: Love the subject but it not respected as much as the others, but it is essay based