Very violent thoughts

I used to only have intrusive thoughts about harming myself but now it’s very often other people. I don’t know why but especially if I think of something sexual or I get really angry I just imagine killing people. I wouldn’t want to do these things, but sometimes it helps me stop thinking about what I was thinking about, and other times it just makes it worse. I feel like really screwed up in the head cuz I can’t stop thinking about violent things…is this normal