Am I like going insane or something?

Lately I've been seeing things like just random things in random places and sometimes I hear people calling my name from far away but sometimes they whisper in my ear. I never answer them kuz I'm afraid. And I always feel things like things crawling on me and sometimes I feel like hands grabbing me and one time it pulled on the back if my shirt and choked me for a second but nobody was there and half the time I'm thinking about killing people and I dont want do but I do and it scares me kuz I'll go somewhere and think this is a good place to stuff a body and then I'm like no why did you think that?! And when I'm mad at someone I draw pictures of me killing them and then when I see the pictures the next day I get really upset and I'm just really scared and I talked to my mom about it but the only thing she can say to me is PRAY and I don't even believe in god or anything so that's like no and she refuses to take me to a doctor because apparently god will fix all my problems but like he's not even real so I don't know what to do please help I don't want to be a serial killer pleeasseee:(