You can get Isocort on the net, non prescription, and it may help after several weeks. I would certainly see a doctor first. Sometimes if blood testing doesn't show the problem, then urine testing will. That is what happened with me. I found the doctor's prescription strength hydrocortisone to definitely work better than Isocort, even though it wasn't, supposedly, that much stronger.
If you are female I would not mess with DHEA. It can have masculinizing effects, definitely. There are other ways to build up your DHEA without taking it specifically.