Scared

I am 19 weeks along. Last week I went for my level 2 sono and the growth of the baby was right where it should be. The only concern detected was fluid in the baby’s abdomen. The doctor did not say much about this other than to want to do another sono in a couple of weeks to see if there is a change in the amount of fluid present. When looking up this concern, I found that the prognosis of the baby is not a good one. Has anyone else has experience with this?