Third pregnancy question

Vanessa • Wife to a great husband, mother to a gorgeous 12 year preteen, a handsome 21 month old boy, and expecting a baby girl, Avi Jai, on 9/22/18.

This is my third baby. My first baby was born 4 weeks early (I was 19). She was considered premature. My second came early as well at 35 weeks ( I was 30). He was also premature. Now I’m wondering, what are the chances of this one coming early as well? I’m 5’3”. I’ll be 32 when this baby is born. Im 16 weeks tomorrow. Just wondering if anyone has experienced anything similar. Both of my pregnancies were considered normal. This one is as well.