Hii there

D, I am planning to Biology Chemistry and Maths (for some sixth form / colleges I do bio chem phy maths)
(My school doesn’t have a sixth form)
I have received my recent mock results , most of the subjects are pretty great except biology(I got 6 ), which I want to do for A Levels. However to get into the sixth form or college, the grade requirement to do science subjects are around 7 or even 8s (private schools) in GCSE. For my future studies, I am really interested in studying medicine or dentistry. I do enjoy learning about biology but I feel like I don’t know the exam techniques in biology or maybe the marking is really strict. I am unsure if biology is really my thing, should I change my A Level Subjects choice ? I feel like the schools wouldn’t want me if they see the 6 in biology ;-;.
I look forward to all your advices and guidances. Thank you !!!