2hard - first of all, i don’t like to know you’ve been overdosing medication. this might indeed be the cause of some of these symptoms you’re having — to cut, double or change your prescription without consulting a doctor can have very serious outcomes.
judging by your description, this is clearly not a simple matter of insomnia; rather, insomnia is a symptom of something else that’s affecting your brain. your suicidal behaviour also concerns me deeply. this could be some kind of hyper-stimulation of a brain area, or clinical depression. at any rate, i can’t emphasize enough how important it is that you look for a psychiatrist right now.
what you have doesn’t seem anything out of the world, by all means: that set of symptoms suggests some fairly common psychiatric disorders which are all easily treatable if diagnosed in time. but you must look for a doctor, quickly — you could be as good as new in a month, but you must look for professional help.