true or false labor 37 wks

I got up this morning feeling funny but I went to work anyways. while at work I was cramping a bit and a coworker asked if I was timing them. I said no but then started paying attention. They were happening every 20 to 25 minutes but very mild cramping like mid period cramps or preperiod cramps. I decided to leave work at 11 to go home and keep an eye on it. background: I have had the weirdest poop all weekend I'm pretty sure my bowels are empty at this point. I also have been very spacy the past 2 ish days. Also as of this morning my need to pee has gone from every 20 minutes to as soon as I stand up from peeing. I should probably call the doctor...