Have Had Loose Stools 4 Weeks,have Divertickulouss In Past,had An

Have had loose stools 4 weeks,have divertickulouss in past,had an Ekg and stress test last week,cardiology Dr said all good, I have a flutter feel in in upper chest that causes my breath to be short feeling,makes me light headed and slight blurry vision,,I am able to walk a mile and a half,cut lawn,what ever,am 65 year old male