Post covid. And arthritis like issues]

Good Evening Doctors! Respected 🙏 Around one and half months passing through after recovery from covid. Recently I have improved many of manifestations. But these days having frequent urinating specially at night, drying mouth,burning and itchiness on skin, change of skin colour, upset stomach, feverish, A mild pain in urinary track, burning feet etc. And decided for a test related to sugar level. so,can these all related to increased sugar level. Please can any of you cleared out these doubt. [ note : - I wasn't admitted to the hospital, didn't have given any steroids,Accept medication at home, even CT thorax scane was reported normal, after spo2 level always shows  between 99-98, but since a few days my pulse showing below 70, sometimes 62-68, and myself Quite immune compromised, bcoz before this covid I used to have often seek for the treatment of vitamin d deficiency and arthritis like issues] Thanks & Regards 🙏