complicated first pregnancy..

S
I'm only 19 with my first baby girl and she's due in May, but the past few days have been terrible. I'm only 28+3 weeks and I was admitted to labor and delivery for contractions and bleeding where I received steroids for her lungs, something to stop contractions, and several IV bags. I was i finally discharged last night but I had a check up with a doctor who isn't my regular and she checked my cervix and said I was 50% but not dilated and ever since she checked me I've been bleeding but she said that was normal and to not call unless I had cramping and clotting.. I'm so worried I'll go into preterm labor with her