SEVERELY thinning hair for over a decade, have been told by 2 specialists that non-surgical hair replacement is only option. Have agoraphobia due to this&red shiny face that easily gets very flushed since age 19.Also get very hot&sweaty easily. PTSD exacerba

Thyroid problems? Hair loss in women can be due to a variety of causes. You need a thorough history concerning severe chronic illness, major surgery, thyroid disorder, crash diets, inadequate protein, and certain drugs (Fiedler & Gray, 2003). I think that there is certainly hope for restoring most, if not all of your hair loss.
Get out & live! I trust your thyroid's been checked, that you've had a workup for alopecia areata, and that you know rationally how many of your fellow-women have normal hair but wear a wig for beauty. Truth be told, you sound like a fine woman, still young (you're 29, right?) You have no right to hide yourself and your essentially intact beauty with agoraphobia, social phobia, self-consciousness or whatever.
Therapy? Have you yet tried any form of psychotherapy? Typically, the optimal combination of things to treat emotional issues such as anxiety or depression is medication (which, on your best day, is supposed to take the edge off symptoms) but the real gruntwork takes place in psychotherapist's consulting room.