Look for books on math and physics. I dont really recommend studying from online programs since the internet isnt always right.-Hang out here in the math section, you can learn from us.......
Calculus should be taken online or at a professional standard. This I recommend at some of the website links I will provide in the source and/or try to visit educational centers that will provide the information to do so.
All in all, I wish you best of luck and remember to always give it your all.
It's a good idea to start back with the foundations of math. During long breaks, for example summer break, get a tutor and meet almost everyday and just go through everything you couldn't understand. Do whatever you can to continue in what you like. I was the same with Biology, and I just had my parents and tutors help me as often as possible.
Try to do some self studying. Go to the library everyday and get some books to study. Look for books on math and physics. I don't really recommend studying from online programs since the internet isn't always right.
Hang out here in the math section, you can learn from us.