Is this related to a trip or is this something you feel normally. "Feeling like I'm going fucking insane" sounds like just a typical bad drug experience. The "losing control of your mind" is another common feature of the same thing. If you are on things right now or have very recently, I can say that its the drugs from personal experience. Whenever the stuff wears off enough, just go to sleep get good long sleep. Then, do things for fun when you can to help you feel better. However, feeling like your "going mad" not connected to a drug experience is somewhat worrying, but its probably just anxiety. If you really seriously feel this way and it has nothing to do with being on drugs then maybe get checked out if its real bad. Generally though, people who "go nuts" do not know that they are going and wind up thinking their someone their not, act like a maniac, lash out at their friends, have multiple personalities, say crazy things, and usually just act completely nuts ALL THE TIME. It varies a lot and not everyone who is nuts doesn't know it, yells at people, has a split personality, etc. but usually they have some sort of very disturbing symptom and don't really think much of it