I Just Had A Colonoscopy Three Weeks Ago And I

I just had a colonoscopy three weeks ago and I am still experiencing a bloated distended stomach and now gas throughout the day. now I see whitish, putty colored stools here and there.I also have a hard time holding it in when I am out and trying to find a bathroom.The colonoscopy Dr. said after the procedure that everything was alright , no cancer, just a polyp, m\but these symptoms are something new. I am experiencind occasional loose, gassy stools or at times I find it hard to go. when I know its there. please advise me. The white stools have me concerned