36 weeks and cramping

Hey ladies so I'm 36 weeks today with my 3rd baby. At my last Drs apt baby was head down and ready to go. So last night I was up and down my body just felt irritated all night. Ended up falling asleep on couch at 4:00am. This morning I woke up feeling like I'm about to get my period. Cramping that comes and goes some is in my back but it's mostly just sitting under my bump. I do not know if I'm dilated as Dr didn't want to check me due to sometimes that brings labour on. What's everyone's thoughts? Labour or is my body still just getting ready?