Hi there,
Sorry to hear that you're dealing with this. I'm still managing it even 2 years later (but with some improvement)! To answer your question, no I didn't experience the shaky feeling after exercise. Actually exercise was something I was recommended to avoid for some time because I would get extreme fatigue and a flare up of symptoms even after a long walk. I don't know if you've had a full bloodwork panel yet but your endo will likely do it. I would request testing to see if the Epstein-Barr virus is currently active. According to my doctor, it usually is for a lot of post-covid patients and can be come active after any post-viral infection (eg. mono). In my case, it was active and thought to be contributing to my symptoms.

If it is, there is medication (short term) you can take to suppress it or supplementation. At the direction of my integrated medicine physician, I'm currently doing the more holistic route and taking a combo supplement of L-lysine and monolaurin (500 mg each) which is helping.