@reedvr2
Do you see a neurologist now? If not, you should so you can get lower EMG, nerve conduction, and small fiber neuropathy punch biopsy tests to check the health of your peripheral nervous system.

I have been reading about neurogenic orthostatic hypotension, endothelial dysfunction and microvascular dysfunction due to some of my health symptoms and issues. Some nerve/cell damage can affect your arteries/veins and circulation. You may want to see a cardiologist or vein specialist/center to see what the discoloration of your left calf could be from. See some links below. Having COVID or the vaccinations could damage endothelial cells which line the arteries and blood vessels which can cause circulation issues. I just read that doctors stop looking for diagnosis if they do not see a blood clot but that doesn’t mean you do not have a blood circulation/vessel/valve issue.

1.
https://www.cvmus.com/vascular-treatment/leg-discoloration-treatment
2.
https://www.usavascularcenters.com/pad-symptoms/leg-discoloration/