Baby growing?!

So, the last 2 weeks or so I have noticed that my stomach seems to be getting a little bit larger and rounder. I will be 15 weeks this week. This is my 5th pregnancy(hopefully second living child). I lost one son at 22 weeks last year and my second son earlier this year at 22 weeks as well. Unfortunately there is no way to know if this baby(little girl) will have the same condition as her brothers because the doctors were not able to figure out what it was that happened to both boys. I do have a healthy daughter who is 9. There is a possibility that whatever had happened to the boys has something to do with the X chromosome, but the doctors said there is no way to know that. With allllll of that being said, I guess I am just struggling with some anxiety about the health of this pregnancy. With my sons we figured out at 21 weeks that they had NO fluid, their kidneys didn’t work, and that they had severe heart defects. So now, I am terrified about whether my baby girl is growing and if she has fluid in there. At night when I lay down my stomach almost totally goes away, and I can easily sleep on my stomach, but when I’m standing up, I definitely look pregnant. This picture was taken this morning about half an hour after I woke up, with nothing to eat or drink. Do any other ladies have this? Is baby girl probably just hiding more because she has lots of room, or should I be concerned that she will also have the same prognosis?!(Also, I know that no one here is a doctor and cannot tell me whether my baby girl will be ok, I am just looking for some insight and similar stories.) Thanks ladies! 😊🥰💛