Irritable Uterus

Have any moms out there had an irritable uterus? This past week I’ve been experiencing contractions and had to do NST tests and stay overnight at labor and delivery because of this. It’s a story I can save for another time, but they said Preterm contractions because of irritable uterus. Does/Has anyone else have/had this? Has anyone had this in a previous pregnancy and what was the outcome? Did you deliver early or on time? So many questions but I’ve been in so much pain since this started! Can’t wait to be done…we’re almost there!