Preterm Labor

Hello ladies, I am having some anxiety and just want to hear from others what their experiences have been. I went into preterm labor Thursday this last week and the contractions were every 2-3 minutes lasting 35-55 seconds long. It had been about 40 min when I decided to go to L&D and get checked out. They gave me an IV and fluids and then gave me a pill to try to stop the contractions and neither worked so they admitted me and after a couple hours of nothing helping stop the contractions they gave me a steroid shot to help baby's lungs and then put me on a magnesium drip and admitted me to watch. I didn't dilate at all but effaced to 40%. They ended up releasing me about 30hours in and after the contractions had stopped. I am only 33 weeks pregnant (33+4 today now) and the test for preterm labor came back negative. How many people have had pre term labor and went full term? I had my first son a month early so I am on edge this one could be coming soon. Hearing others stories either way helps! Thank you!