a little worried, going to the dr tomorrow to have my cervix checked. im 27 weeks pregnant with my first child. saturday…

a little worried, going to the dr tomorrow to have my cervix checked. im 27 weeks pregnant with my first child. saturday I went to the ER after having contractions and back pain all day. The ER doctor said the baby was very low and I was thinned 60%. after two hours and no change to my cervix they sent me home. anyone elae have a similar experience that early? just dont know what to expect.