yes...internal core pain , worked up by gi with nothing to show. It is worse in am
but during the day it will radiate to under scapula and shoulder with pressure in abdomen. Tremors of hands and arms exist mostly when I "stress the muscle", i.e did small resistance loop bands with arms for 10 minutes and tremors present up to four hours later.
I, too was very active and exercised , ran half marathons before covid. COVID in October 2020. So disturbing. I would love to know where you are going for care. My local has no answers or suggestions for treatment. Pain in chest and abdomen is relentless.

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