Hmm, you;re between a rock and a hard place.
Adrenal fatigue is a good possibility and should it be confirmed, it really presents a challenge since you will have a conflct with your conventional Endo and possibly your PCP, as they usually turn a blind eye in such cases.
The issue is that thyroid treatment in most cases like yours, must be suspended while treating the adrenals Adrenal Fatigue can easily progress to stage 2 or 3, if this is not respected.
You must correct your deficiencies, some of which are linked to reverse T3 (rt3) dominance (more on my next post later) and try to hook up with a reputable Functional Medicine or Naturopathic doctor to help you with all this.
I'll post later, when time permits.
Your positive Lactate Dehydrogenase is non specific,
so please don't jump to conclusions yet.