Wrong A level choice- is it too late?

Hello everyone
I've started reconsidering what I want to do in the future. I was originally planning to study Sport science at degree but feel that I am also interested in physio therapy or nutrition (something along those lines). The deadline to change courses was last week and I am looking to change psychology to biology. I am not enjoying psychology as much as I thought I would and have realised I may need biology more than I thought I would 😬 Will it be too difficult to catch up now? How much work have you biology year 12 students done and do you think catching up is realistic? I am pretty sure I could do it in the upcoming half term holidays but am looking for a second opinion (despite the changing deadline I'm sure if I explained the circumstances it may be possible).
Thanks!

I do bio
What board do u do?
It's not too hard to catch up as we haven't actually done that much. I do OCR gateway spec A and don't always know what the hell one of my teachers says (she is a good teacher though) but the textbooks really helps
If ur confident and committed to work extra to catch up u should be fine
Good luck!

If you can make the change then it's probably realistic to say you can catch up. Good luck!