I agree with a phone call to the doctor. If you're having 3 or more bouts of diarrhea I think they recommend you go to the doc BC it could be something serious like the flu, but also could be dehydrating you. Drink water, pedialyte &/or Gatorade as you can to try to stay hydrated.
If it is the flu it can be harmful to your baby especially this early in the pregnancy. If you have a fever I would definitely go see a doctor. But in the mean time maybe just phone the doctor to ask what they think.