Preterm labor at 30 weeks 3 days

Yesterday I had more then 8 Braxton hicks contractions an hour for 2 hours, so decided I better go get checked to make sure everything was okay. I was thinking I'd get in there and they'd say everything was fine. They hooked me up to a contraction monitor and my contractions were 3-4 minutes, they checked me and I was 2 cm dilated. Luckily I went in early enough to hopefully have stopped the labor. They gave me 4 pills of nifedipine and just took the last one at 5:30 today. The contractions had slowed down enough last night that they were able to release me and said if they come back to go straight back to labor and delivery. I now on bed rest and have only had a few contractions today but nothing consistent. I'm very worried that the contractions will start up consistently again. Please keeps babies and I in your prayers.