Is anyone else dilated already?

Last Tuesday (29 weeks) I had been having regular contractions for over 24 hours.

I took myself to l&d once the pain became so bad I began puking. The nurse who checked me said I was dilated to a 1-2 and my cervix was soft and open. They gave me the muscle relaxer shot and that stopped the contractions for a couple hours. They hooked me up to iv for fluids bc I was severely dehydrated and then sent me home a few hours later. I was still contracting regularly after they discharged me and well into the night but they said they weren’t concerned about preterm labor since I had both my daughters at 37 and 38 weeks, it wasn’t likely I’d have preterm labor with this third child. that I probably just had a stomach bug that’s been going around. They didn’t send me home with any instructions and didn’t tell me to follow up with my doctor. But I’m kinda concerned...this is my third child and I never dilated this early or had regular contractions like that until I was 35+ weeks.

Is anyone else dilated already? Does anyone have experience with dilating this early? And what were the outcomes? I have my scheduled cesarean for 39 weeks and I’m scared I won’t make it another two months. I feel like I did shortly before my water broke with my first...

Also any advice on whether I should be limiting my activity? They discharged me with no answer and my papers had no information on them either ):