1cm dilated at 24 weeks

I went in to L&D for what I thought was Braxton hicks contractions. Nothing hurt but seemed to be getting them frequently. Thought they were going to send me home. Instead they noticed I'm 1cm dilated and emitted me. I was 24 weeks pregnant with twins and FTM. They put me on magnesium and steroid shots. Monitored me for 48 hours and ended up being sent home because nothing had progressed. Left being 1cm dilated. Iv been home and pretty much been laying down and not doing anything. The chances of survival go way up at 25 weeks so hoping to hold on at LEAST until then. I can't help but worry and stress if we are going to make it. I would really love to keep them in until 34 weeks so trying to take it a day at a time. Has anyone else experienced this?