I understand your concern. The unknown can be very worrisome.
However, I'd like to tell you that the body is an amazing mechanism. I've seen it do downright miracles, when everyone expected disaster...such as a perfectly healthy baby after a car accident at 4 months along. ...And a joyous momma who had arthritis all of her life.
It was my privilege to tell the last lady that she was on a track, that whatever the outcome would be, she had done her best...and that there was absolutely no use in worrying.
There really isn't, you know.
What will happen, will happen. Your job is to do the best you can right now, and to relax. Adjust your choices to the best you can figure out, and enjoy every success as it comes.
Besides, if there were anything wrong, I'm sure you'd have felt it. This is one of those occasions when no news is good news.
Surround yourself with patient and supportive friends. This is a great adventure...the best.