Is it possible to complete A2 chem in 3 months

I’m taking a gap year I always planned on doing so since the start of the year. In as I got a C I’m rlly hoping to improve it to a B. Due to complications this year I wasn’t able to be there for most of the time. As a results I felt behind and I’m rlly starting from square one like I got a U in my mocks. In my other subject I prioritized because they are Cambridge and you can’t repeat them I did pretty well last year got an A and B.
Is it possible to do evreything? Pls lmkk