Just need some advice if you have any.

So I was on a medication for about a year and a half but took myself off because I couldn't afford them and didnt have insurance. I went cold Turkey about 4 months cuz it seemed best to get it over with. Now I have way more symptoms than I did before I was on any medications. I feel like almost homicidal and angry that Suicidal and tired. I just want to fillet someone open to watch them suffer and bleed (mostly one person and sometimes I think of dry runs) sometimes these things come into my head and it gets so hard to concentrate on anything. There is so much detail and feelings that shouldn't be tied to this but here we are. What should I do? Should I go back to my Dr?