Been refer to a high risk pregnancy doctor

To say this hasn't been the easiest pregnancy is a understatement. Was diagnosis with hypermesis gradvium in my first trimester. Been in and out of the hospital for dehydration. Had a picc line put in and taken out. Now in my third trimester and still throwing up and having a hard time keeping food and fluids down. I am now experiencing contractions and on bed rest after a positive fetal fibroctein test. Had a ultrasound to measure my cervix. Doctor decided to do a growth scan while I was there. Turns out baby is measuring behind and small. And my fluid low. I have been refer to a hisk risk doctor for a another ultrasound and recommendation. Who i see tomorrow. Has anyone else been through this? I am a little nervous. I am now 32 weeks. 33 weeks on Friday. My doctors didn't think I make it this far. A another 1 or 2 would be great for my baby. But now I am worried because they say my baby girl is measuring small