I joined this forum because I found your post while looking up possible adrenal problems. Our situation is quite similar. The only way to describe it is an adrenaline attack. And getting to sleep became impossible. My body gets this internal vibration, hot flashes, heart rate elevated, blood pressure suddenly all over the map and sometimes I get chest pains. I was having these episodes many times a day. Recently they have slowed thankfully. I wasn't sure how much more my body could take.

I have ended up in the ER multiple times and the only thing they found repeatedly is that my potassium keeps falling below normal levels. The first time it was so low they put me on IV potassium. And hypoglycemia even though I had eaten and orthostatic hypotension. None of which I have had issues with prior.

My GP says it's anxiety but I am not convinced. I started to think it might be hormonal and begged to see an endocrinologist. He reluctantly approved but he insisted this was all in my head. It's been frustrating. He put me on an antidepressant that I had a bad reaction to. It made my symptoms so much worse:(

Now I need 1mg of Ativan and one muscle relaxer just to get to sleep.

Edit: I did have an MRI done and they noted my pituitary glad was larger than it was on my previous MRI from 2015.