A decent rule of thumb with psychiatrists is that if they try to prescribe drugs on the first consultation, you need to find a new one. Yes, there are plenty of people in the field of psychology who do good work with the tools they have; unfortunately, this field is also plagued with charlatans who are, like ticks, difficult to pry out completely.
Oh, and OP, I really would strongly advise seeing a mental health professional if you're causing yourself bodily harm to cope with stress. I wouldn't advise "self-diagnosis," but be sure that you're honest in sessions when speaking about what, why, and how far you go in your behaviors/feelings to the best of your knowledge.