Oh my gosh. I feel so bad for you. My adult daughter is experiencing the same thing. She has reported it to every Doctor she has seen & has had "common" tests run which generally dont show anything alarming as her Docs say. But she is miserable & it contributes to depression. They wont even consider that she has long covid because when she was very sick in Sept 2020, her covid test was negative. We know she has long haulers & continue to seek out help.
Hope you feel better soon