@Hearthfire
Do the VCS test online on a proper desktop screen for the mold suspicion.
Get a H. pylori breath testing at a gastroenterologist's office or serological IgG + IgM blotting at a lab for the reflux thing.
Get a serum B12 and homocysteine reading at a lab for both the reflux (if neurological sphincter dysfunction) and dysautonomia.
Get a hydrogen breath testing upon 75g oral glucose at a gastroenterologist's office for the gut issues to rule out SIBO. Get a stool culture for fungi too. If ever going for a gastroduodoscopy insists on a duodenal aspirate sample with histology for giardia and fungal culture.
@Hearthfire said:
started very suddenly around the June 19th
That's just over a week. Dysautonomia as a distinct self-sustaining entity per se is a thing that develops over weeks and months as a result of other functions being screwed up. For you it's a reactive, secondary symptom to an acutely underlying primary issue.
As for the resting heart rate and tachycardia when standing maybe you are simply lacking fluids or electrolytes like sodium, potassium, magnesium or calcium because of the heat or traveling or your gut issues.
147/105
What the tachycardia in POTS does is keep the BP at about normal because the peripheral vasoconstriction doesn't match up but with this BP reading it's just not typical for POTS but more likely a cardiac or cardiac nerve thing instead of an overaching, system-wide-nervous system issue.
Causes of cytokines and LPS, lack of electrolytes and fluids seems most likely.
You may even find some decade-old pharmacy products comprising b12, b6, potassium, magnesium and some taurine which can acutely ease such symptoms at the level of cardiac excitation.