How did your labor start??

I'm curious to how others labor had started?? I'm only 37 weeks, but the past 5-6 days I've had loose stools and upset stomachs. My midwife won't check me, but told me yesterday baby's head is very low. I'm starting to get crampy pains right above my pubic bone that stretch to the vagina to the rectum 😁😁 ftm though so I have no idea if they mean anything.