D.H.
You've already gotten plenty of responses, but I wanted to add that when you are pregnant, or at least for me and I've had 5, I've never felt bad when pregnant, especially not that early on. Usually I didn't know that I was pregnant until I was 6 weeks or later. As far as stomach pains, you don't usually feel anything until a few months later in the stomach and it's not painful. Diarrhea yes, but it does sound like you are sick or ate something bad.
Mother of 4 living children