Thank you for taking the time to respond, I appreciate the info and I will definitely follow up on the advice you've given, especially Dr. Grubb's talks on the subject.
I think that I would not always fail a tilt table test myself as my condition fluctuates, however at my worst I would say there is a very good likelihood that I would.
Getting a test during that specific period of time may be difficult as at my worst I've come very close to fainting and it has put me in some less than dignified situations in public when dealing with it.
I actually had a heartrate monitor test back in 2014, the unit was issued to me from a hospital and after so many days I was required to return it. Nothing by their estimate was conclusive, however this is the same healthcare system that found definite signs of lymphocytic infiltration on a salivary gland biopsy and didn't diagnose me with sjogrens.
As far as immunological reactions, I've been having absolutely terrible allergic reactions as of late. Approximately every 5-8 days I seem to build up to a real rip-snorter of an allergic response in which my skin feels like it isn't merely itching, but burning along with the sensation of being pricked with needles. The irritation is insane, it's not like a typical itch, you feel like you want to jump out of your skin to get away from it.
Thankfully I do have atarax which helps a lot to curtail the allergic response, but it isn't without its side effects.
I do sometimes respond very badly to food in general, there are certain foods I cannot eat and I simply avoid, but even ones that seem "okay" when I'm feeling decent are enough to set off my immune system in other circumstances.
I can't seem to find any rhyme or reason except that eventually my body just can't keep up dealing with allergens and becomes overwhelmed.
I actually cannot eat peppermint, I learned three years ago that it immediately gives me cold-like symptoms when I take it, I believe I have an allergy or some oversensitivity to it.
During the beginning of my symptoms getting worse I used to sweat like crazy, then for about a year and a half I couldn't sweat at all, and now I'm back to sweating like crazy even when it is only marginally warm, like 10 degrees celsius.
At that temperature if my blood pressure is low enough, I'll start sweating like a maniac along with other low BP symptoms such as orthostatic intolerance, shortness of breath, dizziness, weakness, etc.
I recently tried some phenylalanine, which worked alright, it works about half as well as tyrosine does but doesn't give me joint pain.
However I also tried some ephedrine today, and my god, I went from feeling like absolute trash to feeling halfway normal.
My vision corrected itself as it was getting blurry, my muscles didn't feel sluggish and sore, I felt my cognition improve, I felt like my brain was working faster and my memory recall which has been worsening was sharper and more prompt. I also didn't feel like a sweating disgusting mess either even though it was above 10 degrees today, which speaks volumes about how greatly your body can change when one simple neurotransmitter is not working or present as it should be.
IIRC ephedrine sort of acts like a pseudo catecholamine and it has reinforced my hypothesis that I do in fact have some kind of serious catecholamine issues.
Even as little as 4mg of ephedrine made a world of difference, and even then it was on the high side of what I think I'll take again as I felt a little "too" energized.
I wish I didn't have to rely on it to function, but until I can actually see a doctor, I suppose this is what I'll have to use to get through the days where I have to be active and attend to responsibilities.
