I am so glad that you and the baby are doing ok. What a scary experience. You are in my thoughts and prayers.
I know the doctor said that stress does not cause a miscarriage, but I do think it does affect a pregnancy, just my opinion. I had just started the nursing program back in 2000 when I found out I was pregnant, and I too decided to postpone the program until after I had the baby.
I was working at a hospital as a CNA, and I cross trained to unit secretary because the CNA job was very demanding. There were about four other people at work who were pregnant also, we were within 1-2 months of each other. One CNA and 3 nurses. They continued working full time 12 hr shifts, and all four of them ended up going into early labor and had to stop working. We often wondered if it was the stress of the job, the unit was extremely busy, and the 12 hr shifts.
I think you've done the right thing. As someone else said, school will still be there after you have your baby. I am now in my second year of nursing school, and I don't regret for a moment that I postponed school for family. You will make it to your goal, even if it is a little later than expected.
For now, just get your rest and take care of you and your little ones. Best wishes to you!