I have to agree there. One can only do what one can do. I had to try to acknowledge my limits in choosing classes or I knew I'd lose my GPA, which, incidentally, is what colleges look at mostly. That and your ACT or SAT scores. It's not necessarily whether you're an honors graduate or not.
Well, if you can't get out of any of it, just remember to pace yourself, petition God for clarity of mind, and just do your best. You don't have anything to prove and it's not a competition. You're smart, I know. I also know that whatever you take on as a career, you will do well at. Remember, high school is not everything; it's actually just a tiny bit. I know you'll survive.