Really discouraged in my math major
I don't know if this is the right place to post this, but I have lately been feeling like I might just not be smart enough for my math major. I am taking calculus on manifolds this semester (in the US, were using Spivak) and we just had our final exam today. I could only answer 2 questions out of 6, the whole concept of the ideas that we need to know to understand stokes theorem just feel way too dense for me to wrap my head around. I understood up to k-folds but after that, the concepts are just too much for me to understand, I feel. We started from k-folds 3 weeks before finals and were expected to have mastered stokes theorem by finals and I wasn't able to. Is this common? I can't imagine if things are already this hard, how I will survive the rest of the degree. Until this last couple weeks, I felt like I could handle it (had around a b) but after that, the difficulty suddenly felt like it rose by a lot.