Post covid. Simple food. please do help.

Hello It's 2.5 months after covid, i feel feel my legs muscles very weak it's like there is no contraction.sometimes balance problem My vit d, calcium are normal b12 is at border line around 311 . Sometimes I feel my legs muscles like rubber sometimes and sometimes legs looks like heavy. My liver, kidney functions test are alright. I Alresdy taken supplements multivitamin for a month this problem is not going.. My uric acid is very slightly high at 8.20 although no pain at joints or anywhere.. I don't know which doctor to visit neuro, physician or ortho i am not able to perform ordinary works also and stresses due to this since suffering from almost three months and i also have anus hotness often and severe gas even after having simple food.. Please do help...