Changing a level choices URGENT!!

So originally I was doing chem,maths,further maths and history but i switched chem to physics in October(big mistake) and today I was allowed to switch back to chem because I now know for sure I want to do medicine(so i need chem which was the only reason i was allowed to change) I know I’m not like someone who has wanted to be a doctor since they were a child but medicine is genuinely my passion and I can’t see myself in any other job.
Is it worth trying to ask to change history to bio aswell? Or would that just be impossible to catch up on both chem and bio.
Also does anyone have any tips for catching up with the chemistry content?
I’m in year 12 btw

So originally I was doing chem,maths,further maths and history but i switched chem to physics in October(big mistake) and today I was allowed to switch back to chem because I now know for sure I want to do medicine(so i need chem which was the only reason i was allowed to change) I know I’m not like someone who has wanted to be a doctor since they were a child but medicine is genuinely my passion and I can’t see myself in any other job.
Is it worth trying to ask to change history to bio aswell? Or would that just be impossible to catch up on both chem and bio.
Also does anyone have any tips for catching up with the chemistry content?
I’m in year 12 btw

I'm not 200% sure but do you not need chemistry and another science (bio/ physics) for medicine? So if you genuinely can't imagine yourself doing anything other than medicine, surely don't you "have" to switch to bio?

Correct me if I'm wrong but as far as I'm aware you would need two "sciences" and since maths counts as a science surely that is acceptable?

Like I said before, I’m not 200% as I’m not doing anything related to medicine. If maths counts and is as equally valued as bio/ physics, then you should be fine. Depends on the uni you want to go to and their requirements.

if you did triple science gcse, biology a level should be straight forward so far and you can catch up as it is november

So originally I was doing chem,maths,further maths and history but i switched chem to physics in October(big mistake) and today I was allowed to switch back to chem because I now know for sure I want to do medicine(so i need chem which was the only reason i was allowed to change) I know I’m not like someone who has wanted to be a doctor since they were a child but medicine is genuinely my passion and I can’t see myself in any other job.

Is it worth trying to ask to change history to bio aswell? Or would that just be impossible to catch up on both chem and bio.
Also does anyone have any tips for catching up with the chemistry content?

I’m in year 12 btw

I'm not 200% sure but do you not need chemistry and another science (bio/ physics) for medicine? So if you genuinely can't imagine yourself doing anything other than medicine, surely don't you "have" to switch to bio?