I Started Taking Lexipro About A Month Ago. Since Then

I started taking Lexipro about a month ago. Since then I have had close to what I would call diarrhea after meals. Also around Dec.22 I started getting a cold. Around the 26th to the 29th my cold was pretty bad, then got better, but has not yet gone away and I still feel pretty exhausted. I am wondering if having the diarrhea is contributing to my exhaustion , and if this is related to my cold lasting so long?