I too am disappointed with the Mayo Clinic. In short, I had Covid 19 in early January, got abdominal pain and rapid heart rate late January. February heart rate increased went to GI. said I had gallstones. Had them removed in March, no relief. Had another CT. Had kidney stones removed in April. All this time taking various medications for indegestion, IBSC, IBSD , I had an endoscopy, colonoscopy, blood tests, UA, all negative. I am now 12 lbs lighter. One ambulance trip to ER shows I have a UTI(I told them this is not why my stomach hurts). May - still losing weight. GI says I have a torn abdominal muscle. Go to another GI he puts me on Nortriptyline. No help. Beginning of July start to feel dizzy, faint when I get up in AM to let dog out. Heart rate now rests between 117 - 124. Had nuclear stress test. All good. Cardiologist does not want to put me on Beta blockers because it can cause your blood pressure to decrease. Come back in 3 months. End of July had pre scheduled hip surgery. Non weight bearing for six weeks. Blacked out for nine minutes in garage. Went to ER. said I have another UTI. Sent me home. 2 weeks later, about pass out again. ER doc said I was severely dehydrated and wants me to be observed and have IV’s for 24 hours. Next day I can’t stand up without my heart rate going to 162. Cardiologist came in and said I probably have POTS (a result of having literally being in bed 8 months). I don’t think my doctors believed me when I said I had been literally in bed 8 months!! Electrophysiologist confirmed POTS diagnosis with the help of my 24 hour holster reading in July which showed my HR up to 165 at one point! Called Mayo MN after 3 specialist recommended I go there. They turned me down! Why?? UTSW Dallas can’t see me till August 2023. I am now 106 pounds, 57 year old who 9 months ago walked 18 miles per week and swam 4 - 8 hours per week. Who in the medical community cares?