Reason to worry or not?

Starting about mid-day yesterday, I began having diarrhea. Around 10 or so last night, I started puking. This morning, I woke up and I'm kinda feeling crampy all around, but mainly my sides and back.

Should I be concerned? I'm only 34 weeks.

Also, I don't have a way to get to the hospital or Dr to get checked. Plus, I don't want to go if it isn't labor or anything as my insurance only pays for so many visits.