feeling like I am the only one......

I am feeling like I am the only one on this app who isn't carrying a healthy baby, at 18 weeks I got the news that my little baby boy has multiple heart defects, at my appt today, at which I am 27 weeks, the baby's head is not growing because of the heart defect, I have had two fetal echos, and I have two more coming up, now I also have to see a geneticist, and have to get an amniocentesis, has anyone ever had one I am freaking out about it and don't know what to expect, I am due July 3rd and very nervous, just want to cry.