A lot of the population does my friend. More then you know. You are not alone and yes there is help for your symptoms. Please seek the help of a physician. They can and will help. Things WILL get better. Hang in there. :0)
i often hear screaming in my head, its not my own voice, sometimes it screeches my own thoughts but its mostly unintelligible. its very loud and drives me crazy, it doesnt happen at a particular moment,but random points throughout the day or night it will happen. does everyone have this?
No, not everyone has this, they have thoughts but not voices. However, within the population you are not the only one to experience this. You should speak to your doctor, so they can ascertain what might be causing it, and how to treat it so that it doesn't bother you anymore.
Not everyone, seek your doctor, individual counseling and group mental therapy, online groups and pray. Don't give up. Lots of help is available. It takes time to get your mental health under control.