There are some more good posts here op, hopefully this will encourage you but my teachers in high school said I'd never get a higher grade than a C, I went to lunchtime lessons, self studied a little bit and got a tutor to take me through some of the stuff I didn't get taught in class and came out with a B so ignore what your teachers say. Only you know the potential inside you. Due to my disability there was a time when 'experts' thought I wouldn't even be able to talk, let alone live a normal life like I do now