Hi help me,
Welcome!
It sounds to me like you could be physically addicted, but, of course I don't know for sure. As you say, it might be psychological addiction, but at any rate it sounds like you recognize you have a problem. I'm a recovering alcoholic so don't know much at all about drugs, but you might check out the Substance Abuse forum on this board to find more information.
Hopefully someone else will be along who can answer your question.
Anna