Good for you for persevering. Try thinking about the most realistic worry you have then ask yourself what would happen. Ex: your worried what your teacher will say when he figures out that you forgot to do your homework. He'll figure it out eventually. Then what? He'll probably ask you to make it up by whenever. Then what ? You'll get an even lower grade. Then what? You make it up by doing extra credit. The outcome most likely will be better than you thought