Upset stomach!

Last weekend I had two straight days of feeling absolutely miserable. My stomach felt so upset daylight to dark, but I never could distinguish whether I felt the need to poop or puke! The week passed, I felt better, then I woke up feeling the same way again today and the feeling has yet to pass. I'm not constipated, and I don't throw up when I try. Just wondering if anyone else is having similar experiences? I'm 30 weeks.