26 weeks, 1cm dilated, 50% effaced...and worried!

I've been dealing with a shortening cervix and funneling for about a month and a half. Monday my doctor admitted me to the hospital because I was dilated 1cm along with my shortened cervix, which is now 50% thinned. I was watched and given steroid shots to help baby, but was released Wednesday because I'm not having contractions. I'm now on bedrest until my appointment Monday, when I will find out if I've dilated more. Has anyone experienced this? Do you have any advice? I'm so scared my baby girl is going to come too early.