Personally, I think that the more you enjoy it, the more you start to understand and connect the dots!
With chemistry though (I'm currently doing AQA), a lot of it is repeated!! I see it as a subject where you learn one thing and if you apply it to the next, it makes sense.
Good luck anyway, and keep asking your teachers (I do it all the time until I understand).
Wow! Well done on your results
, I'm sure with chemistry that you don't hate
that much, I mean you worked super hard for it I bet. If you are worried though, do lots and lots of exam questions. Is maths since the UMS version or has it changed?
Be more confident!! I'm sure you're amazing, nobody gets A*'s just randomly, they weren't just dished out to you, YOU worked hard for them.
Good luck
even if it's hard you're still having a go at it and that's all that matters in the end.