Hello ,my dad who is 61 year old he has his coughing from a long time now, from past few months he is coughing more than usual ,he has taken covid vaccine both the doses and never smoked before and he is also diabetic ,he took home medications and cup syrups did not work that much ,so we went to the doctor near by and he gave him allergic medicine mondeslor tab and foracort 400 ,he did not get the inhaler but he took mondelsor as prescribed yesterday night and he has now developed joint pain ,he can barely move his hand ,he says its very painful ,i checked in side effects joint pain was one of them ,to get rid of it he took calpol 650, after a little while he has fever now 100.1 ,i am really feeling scared we will take him to get covid taste tomorrow but is it covid ,or fever developed due to pain for the medicine we tried calling that doctor but he is closed today pls help me what should I do ,what steps should I take?