Could Cough, Fatigue And Tingling In Feet Be The Withdrawal Symptoms Of Prednisone?

I have ra and have been taking high doses of humara methotrexate prednisone have stopped everything for a month been very sick yellow skin diahrrea everyday cough fatigue tingling in feet stomach pain usually very healthy but cant get over thought I had cold to begin wiyh but this I know something is wrong can you please tell me wat tests to hae my dr take