That happens to me. Some days are fairly normal (no faints) just nausea, pains, fatigue, etc., but on some days, something will “trigger” a sudden drop in my BP and then comes the syncope, tachycardia and fainting. Sometimes I make it to a soft surface to fall or get horizontal on and sometimes I don’t and I get banged up. I’ve been able to correlate the episodes with times when I was having a good day but did too much activity (because I was feeling good,) there are the times when I had been bending, stooping and reaching a lot, gardening, standing in hot weather, or overheating myself within my A/C home, standing in line for the public restrooms at a large event, after taking a shower, at the grocery store, standing while rolling my hair or putting on makeup. 3 times I was sitting on the toilet coping with IBS cramping. Which makes me wonder, Is true POTS an EVERYTIME you rise illness? Something a TTT can markedly reproduce? Maybe I have a remitting/recurring variety. I think I need a heart rate monitor.