I need some information from my fellow mommies, Trying to make a long story short..... Sunday I had an unusual uneasy feeling, just didn't feel well. Wednesday night...I experienced menstrual cramping. Last night (Friday-Saturday) I woke up to menstrual cramping and low back pain. Call nurse and went in....I was having contractions/bh regularly with low back/pelvic achiness. I had dilating 1cm. But they said my cervix is hard and long. They gave me a I shot of med to relax my uterus and sent my home. Is this preterm labour?? Or normal during 3rd trimester? I am only 24 weeks, but pg with twins. My uterus is about 28 or so cm high from pelvic bone up. Should I be concerned??