A couple of things stand out to me. The high dhea and the oily/skin acne. It's possible that dhea is converting to testosterone/DHT thus causing the hair loss and oily skin. Too much testosterone can also cause Depression or mood swings.
The other thing is extreme muscle weakness/fatigue, dark circles under eyes, low blood pressure, brain fog and feeling cold are all classic symptoms of low cortisol.
Its possible you are in a state of adrenal fatigue and that your dhea and testosterone are riding high to try to compensate.
The thing that is throwing me off is the coated tongue. This can either be yeast or anxiety. Is your mouth very dry? Do you suffer from sinus problems or stuffy nose. Not congestion but more like a feeling like two pillows are shoved up your nose.
One of cortisol's functions is yo fight infection. If you had low cortisol, your body might be more suspectible to bacteria and yeast. The other theory is that your body has weird adrenaline and cortisol surges as it tries to give you energy to make it through the day. That would put your body in a state of anxiety hence the coated tongue.
You said you had been to 7 doctors. Please share what if anything they had told you? Where they all MD's. Were any of them ND's? Did they have any theories?
What if any supplements or medications did you take? What are you currently taking now?