I regret taking gcse spanish :L?

I really want to drop it because I just don't understand spanish at all, to me its a waste of a subject As I know Im going to fail. I can't remember words and its a stressful subject I enjoy all my other objections apart from spanish. The highest grade I can get is C which I think is rubbish as I could get higher in a other subject I like. Is there anyway I can change subjects please help im DESPERATE