Post corona problems. Everytime i lay.

I was tested positive for corona in sepetember. After that recovery,i had my periods and i started feeling numbness in my head and i felt internal tremors too if i lay.I consulted my physician and he gave me becozyme c forte tablets and nurokind lc for two weeks,himalaya liv ds syrup since i said i had constipation and problems in digestion.After that my stomach problems didnt go away and i went to  gastroentrologist and he gave me ganaton total for 20 days,meanwhile my internal tremors resurfaced,so i went to the physican and he has given me  that becozyme c forte and nurokind lc tablets again,i was able to see improvements with fruits and veggies intake along with the tablets.I had my second periods post-corona,the symptoms werent there,on third day i felt tremors lightly and the tablets intake helped me to manage it,and My stomach is upset,eating fruits relieved it a bit,i want to know if it is b12 deficiency,or it could be parkinsons disease.toe nail is stiffened everytime i lay.