[Adam the Fish]

Ciara,

I'm going to move this to Education and Careers, I think you'll get the best advice there.

I'd personally, though, recommend that you talk to the teachers of these subjects about how you feel. Their job is to get you through them, and if you're struggling and want extra help, hopefully they should be able to give you some extra support.
It's as easy as asking for some clarification or going over something again after class if you don't understand it.

Best of luck!