Im on because but when I took my sugar pills 2 weeks ago my period didn't come for a few days. Then when it did it was light lasted two days. Abt 7 days later I woke up and felt sick to my stomach had diarrhea then was fine after a few hrs. Then got the same stuff the next night, went away after 30mins or so was fine. At work I had cramping a few days later, now today I got the same diarrihea and tummy problems again when I woke up. What could be wrong upset stomach no vomit though.