Hey A. : )
Congratulations on the little one! It is great that the baby is healthy, that is the most important thing!
I had steroids for lung development 24 years ago, when my little one was 20-28 weeks old. We managed to develop them enough that there were no major problems! He was born at 28-1/2 weeks! There were no complications for either of us with the steroids. My son was so young, he took a while to complete his lung development, and his very early birth led to delayed development. We were very lucky that there were no other complications, as he was in oxygen for a long time before he stabilized.
Good news is, he is healthy, is rarely ill, is 6 ft. 2 inches now, and a great young man at 24 years old.
Hope everything goes as well for you!