PLEASE HELP - predicted grades

Chem: I got D in term 1, C in term 2. I’m revising a lot atm and am aiming for 95% + in my March mock, we have no other assessments after March, but we have an assessment in term 6 which I believe will just be like an end of topic one but I hope to get 95%+
Bio: defo A* predicted.
Maths: I got C in term 1, E in term 2. I’m revising a lot aswell and am aiming for 95% + in March mock, after that we also have no assessments until end of topic term 6 one but I hope to get 95%+, I’m thinking of doing maths AS too, in order to boost my predicted grade.
I emailed my head of sixthform about how predict grades are decided, he replied
“ All teachers will be using a holistic view of progress, so it is not all based on one mock exam.
Each subject will have their own system of which assessments they use to establish their predicted grades.
However, saying that, I would imagine the mock will feature quite high in terms of which assessments they use. “
If I manage to achieve my desired grades, will my predicteds for maths and chem be A*??
Btw I wanna do med,AND I KNOW it’s a big jump, but I’m positive I can do it- hence been revising like crazy. Pls just answer the question.
Thank you