I am sorry to say this complexity is moving way beyond any of us here on this board, for understanding the medical aspects etc.

The only thought I can share now, is that it is good you went off the estrogen, since that leads to multi-infarcts on its own. Combined with sticky blood, not a good thing.

Also if your pituitary does not spring back, I would wonder if you had a mini-stroke there already. Adenoma is possible, but usually adenomas begin secreting some hormone in EXCESS... and you don't seem to have that.
Some create low hormone status, some secrete extra hormones. It is really very variable and hard to predict.

Sorry you have to go thru this.
You can vent here however, and the support is still here, but asking medical questions is getting into the beyond realm, IMO.