Preterm Pregnancy

I'm 30 ½ and was told I'm dialated to a 1cm and I don't want this to happen to me of having a premature baby so they put me on bed rest I don't work and my first baby was a full term and I'm just scared and worried don't know what to expect and think I had my baby girl with a c-section I'm trying for all natrual with no eperdural any opinions??