Has anyone had morning sickness that began later in pregnancy? I am 11 weeks 2 days with no nausea until yesterday. Yesterday I had intermittent bouts and today much worse and constant with vomiting and diarrhea (but no fever). I called my doc who told me to just stay hydrated and cool. He said it may be a virus but I'd like to think MS could be the culprit. But everything I read seems to say MS starts much earlier.