I found out a week ago that am 4 weeks pregnant,for the past 3 days i've been experiencing diarrhea and feel dehydrated.is that a cause for concern?

Doctor can examine: Stomach aches plus looser stools can be from variety of causes. People usually see their doctors if symptoms are bad or if they last more than 1-2 days. When diarrhea first starts happening, a person may benefit by stopping eating and start just drinking small amounts (few ounces) of something like Pedialyte or half-strength Gatorade, every hour. That usually decreases the amount of diarrhea.