I'm sure you can do it. Math I believe is the only subject that you can be properly self-educated in. I don't know if you know my situation, I am a freshman placed in Precalculus.
The secret is to actually have a passion for math. Not necessarily all the factors in math (Conic sections are my Kryptonite XD), just the critical things that will do you good. Especially if you plan on some sort of engineering like me.