What the heck is this?! the devil or something?!?

3 years ago, while i was taking a shower, i kept asking myself, "am i going to hell?" but WHY was i thinking that?! i didn't do anything THAT bad...but then i just started looking at myself in the mirror, and while still looking at the mirror, i looked at shadow in the mirror- well, u may think i'm CRAZY... but i saw these really big horns(devil looking ones) sticking out of my head...(turban styled, that way i could dry my hair..u know, most women do this..) -in my shadow! what the heck?! and every once in a while..i get this feeling that "someone is around"..like "an evil presence"... and whenever i'm by myself, i find myself talking to myself (not responding to myself). and when i REALLY LISTEN to what i'm saying..i started saying..well, i'd hate to admit it...stuff about God that i dont think he'd approve of. and THAT's why i'm afraid that i'm going to hell. to try and stop me from saying and thinking this, i bite my lip really hard before i say anything that starts with an "f".