Hi.
About a year and a half ago I was in about the same situation. We had gone in for a routine ultrasound and they found a bright spot on DSs bowel. Through a few more tests we found out that hubby and I were both carriers. I had to go in every couple of months for ultrasounds to make sure that the "bright spot" wasn't growing. I also had to go in every 2 weeks to have non-stress tests due to an elevated AFP level. A year ago tomorrow we had our beautliful baby boy and he did have CF. His bowel was fine after a few days. They kept a very close eye on him.
First I would suggest to make sure that you will be delivering where there is a level 4 NICU(or as high as possible in your area). Make sure that the doctors that are delivering the baby understand what the ultrasounds have said. We went in for a c-section and they made sure that there was a NICU doctor in the room when I delivered. After he was born, he scored 9 on the APGAR, and they told me that he did not have to go to the NICU. After a little while they did an x-ray on his tummy and found that the bright spot was still there and he went to the NICU.
There are a lot of mothers and fathers on here that can talk to you about the whole meconium illeus, but we did not have to go through surgery (thank God) so I can't really touch on that but that not every "bright bowel" turns into a surgery situation.
As far as what it is like to have a child with CF, it is stressful but I wouldn't take it back for anything. I love my CF child and I think it helps to form a special bond that is different than the bonds that you make with non-cf children. I believe that everything happens for a reason and I think that if your child does have CF (I will be praying that he/she doesn't) that you will be able to handle it. This website is awesome for random questions about CF and I love how it is so active.
If you have any other questions, feel free to pm me.
Good Luck!