In late October 2019 I went from walking 10-20 miles every third day with an elevation gain of 2,000 to 3,000 feet to a complete collapse with overwhelming fatigue and weakness. I couldn’t walk more than a fraction of a mile. I didn’t and still don’t have fever or cough, so neither the local hospital or my doctor would recommend that I get tested when I requested it a couple of weeks ago. I still feel too weak to walk more than a few blocks. I’m wondering if I was an earlier contractor of COVID-19. Has anyone else had a similar experience? I can’t think of any other reason for such a dramatic and rapid change of fitness.