Lost Pilot
I was saddened to read your predicament..
It must have been so exhilarating when you first started out and progressed to becoming a pilot. Where you are now is not a good space and is obviously hurting and distressing you a great deal.
You mentioned the "D" but did not talk about your general life.
Are you still active with friends, interests, hobbies etc,i.e. life in general? If so, perhaps you have just run out of interest and aviation is not your true calling after all?
However, If not and the "D" is pervasive, I think you need to put aviation on the back burner and it's far more important for your health and future to consider the overall picture and get some assistance.
Psychiatrists are specialist Dr's. They thrive/ rely on prescribing medication to seek a solution. Not a good idea in your chosen career I would think.
Psychologists are not Dr's and do not use medication. They rely on simply talking things through. Perhaps you could consider them similar to a mentor (the good ones!) ...
Feel free to PM me if you wish..
Best wishes
Octane