Possibly TMI— early symptom of pregnancy

I could be crazy but for the past few days I’ve had an upset stomach. I had a bout of nausea about a week after ovulation but that’s the only time I’ve been nauseous.. since then though everything I eat upsets my stomach. I have had diarrhea all day today and on and off for the past week. AF due Thursday or Friday. Has anyone else experienced bowel trouble as a sign of early pregnancy?