So scared.

So I’ve been crying all day because went to my appointment today to take a peak at baby. When I first found out I was pregnant one hospital did a transvaginal and measured me at “5w2d” I was in pain a couple weeks later and went into the UofM hospital and found their were cysts on my ovaries. At the emergency they measured me “6w4d” instead of what I would have been “7w2d”. So today (a week later) I went to my OB appointment and she also measured me 6w4d again. She is saying that maybe the baby is not growing. However the heart beat is strong and has been strong. I have not had any bleeding only cramps which they said it was from the cysts. I also haven’t been eating as much because I am very nauseous with this pregnancy. If the baby is not growing It may be a miscarriage near or I may have to abort the baby. I am terrified. Has this happened to anyone? If the baby heart is strong wouldn’t it be a good sign? Is it possible that maybe because I’m not eating that’s why the baby is small? Or should I prepare for a miscarriage?