Irritable uterus

Se

So I have twice weekly NST and today apparently my uterus was irritable. Doc said I was having “baby contractions” which I don’t feel at all. I did have some period like cramping this weekend but that subsided. I’m drinking lots of water so I know it’s not dehydration. Anyone have this happen what was your experience? Did you go into labor early? My first I went into labor at 38 weeks so I’m hoping this one comes a little sooner before due date 🤞