Dont know whats going on.

On wednesday DH and i did the deed (; and he camed inside me (tmi) it was the first time he did, and it was a lot! Lol. Well anyways since yesterday morning ive been having diarrera (tmi again lol) i dont get hungry, even drinking water hurts my stomach. Today saturday morning i woke up feeling the same way. I know it cant be anytging related to pregnancy because its waaayyy too soon. Any other sugguestions?