Loss/rainbow

Hi has anybody had a rainbow baby after a third trimester loss? I'm 19 weeks with a baby girl after losing my son at 8 months pregnant to placental abruption. The anxiety is crippling me I have placenta previa a huge hemmorage at 7 weeks I'm on pelvic rest my anomaly scan is next week in fetal medicine as I have low papp a too which I had last time. Any success stories thanks x