Need Advice for May June 2026 session

I’m thinking of doing the full A level for Maths and Physics, I have done the AS before but my results were pretty poor (not really an ability issue just did not plan properly and crammed too much and burnt out and had lack of sleep nights before)

Is it smart that I retake the 3 As level papers for each which I know I can do and also do the 3 other papers on my own (completely new self study)

I need to obtain at least a C in both subjects. Please advise me.