possible labor?

I am 37+5. Measuring @ 39 weeks. I've been having extreme pelvic pressure, bad lower back pain, a little bit of nausea and diarrhea. I have been bouncing on my exercise ball and I walked for an hour this morning. I started to have mild contractions during and after the walk but they weren't consistent and they stopped once I got home and started to rest. I just felt the strong urge to go pee but once I sat down I noticed my panties were a little wet and I couldn't pee but I did go poop. My hospital is an hour away so I hate to go and it be a false alarm, but I also don't want to not go and my labor kick start and progress rather quickly. This is my second baby, my first I was induced at 40+3 so I didn't ever go through this. Could this be the beginning of labor? What should I do to maybe get it going if it is?