After procedure had upper back and chest pain which MD diagnosed as pericarditis. Started on colchicine. Pain went away but back pain and shortness of breath returned. MD wants me to take colchicine for 2 more weeks (causing diarrhea) but no definitive EKG changes shows pericarditis. A-fib returned 1 week after procedure. Do I really need colchicine if what I read in the form it might take longer for heart to heal?