You are Like me with one of the more major symptoms of LC being heart/ circulation related. High Bp were my first obvious symptoms after Covid had gone back in April 2020, with high HR following…no ecg, echocardiogram, chest X-ray etc showed any obvious problem but I was finding it more and more difficult to walk ( having been an assiduous 10,000+ steps a day sort) or even small domestic tasks like standing brushing my teeth or cooking on a stove without pain and breathlessness. Gp had me on 5 hypertensive drugs, and that was it. I tried more self treatment: been swimming last 18 months 5x a week, and at same time intermittent fast 16 hours…no obvious difference, but surely done me some good , even if only mentally! Then I insisted on getting referred to a Falls specialist 2 hours drive away to get a tilt table test, thinking I self diagnosed with PoTS. The week before the test I had a complete collapse out cold in town, followed by dramatic vomiting. The test showed I had postural hypotension, after 8 mins BP had dropped from hyper to 60/40, and specialist insisted my high HR was due to it compensating for this drop…definitely not PoTS. But similar treatment, minus extra salt, with compression socks etc. Meanwhile my GP is also trying to do his bit putting back BP drugs the Falls expert had removed, and tampering with my hormone replacement on my 24 year old hypothyroid diagnosis ( insisting high HR is from ‘overmedicating on levothyroxine’), but that’s another story. It’s depressing how so few doctors seem to know about LC, mine admitted ‘wasn’t interested’ so presumably in Uk others just trying th3 self medicating etc using support of forums like this!