its not a good thing to have a crx being 1 cm long at 34weeks. but that doesnt mean you have started dililating yet. did they do an internal exam? are you starting to dililate? or did they do an internal u/s. I have had 3 premies. 34wks,32wks,and 33wks. they all are healthy now. but i would ask for the betamethizone shots for the lungs just in case. i am surprised they didnt say anything else to you. please update when you hear anything else.