12w1d with large sub chorionic hemorrhage

Brittany • Married, mama to 3 boys. Leighton is 3 years old (7-14-12) and Owen is 1 year (4-20-14) due with Logan, September 28, 2015 :)
Anyone have experience? It was discovered at 10w4d at was very large and I was put on pelvic rest. Now i am 12w1d and started bleeding again, so I went to the hospital and my SCH has grown. Baby is doing well and measuring to date, with heart rate between 170 and 180. Anyone else have an SCH that got larger? What happened? I'm so scared of losing the baby.