Post covid Test and care. And kidney.

I got covid symptoms on 19th April. Initial 3 days I had crocin, vitamin C. 4th day I added zincovit, ivermectin and Minoplast LC. Didn't get fever on 5th day. Weakness started and extreme leg pain on 8th day. I took dolo for two days. Then did some compression, massage and leg pain got better on 13th day. Since my 12th day I have unusual feeling on my left side of chest it was needle like pain before, now that pain is gone but I don't feel normal as before. and this feeling still exists. Oxygen and BP is normal are always normal. No issues in breathing. Today I got my negative report for covid. In other report my ESR count is 44 which is high. Can you please suggest what does this high count mean. Also, what test I can get done to make sure no infection in body and internal organs does not have any infection Specially heart, lungs and kidney.