Pregnant after my preemie!

Angela
Finally got my BFP! My SO and I are so excited, but we did have our 18 month old at 27 weeks 5 days so we are very nerves about going through the NICU again. Anyone get to full term or close after a preemie this early, we don't know why I had my son early other than that my placenta errupted but unsure why. I also know I will be getting progesterone shots weekly starting at 18 weeks and will see a high risk specialist.