Sub chorionic Hemmorage

Catrina • 25. Married to my other half. 5-15-15. 1 angel baby named River. Daughter named Remington. Son named Journey.
Went to the ER last Friday because the pain I was having wasn't typical. Every time my bladder was too full or I emptied it was a stabbing pain. It felt like a kidney stone was passing, a UTI, or bladder infection. Well it was neither and they said it was a sub chorionic hemorrhage. Said if it grows I risk a miscarriage but if it absorbs it's all good. 
I have no bleeding but just cramping. My appt is Monday and my OB just said pelvic rest.
Anybody else have this happen? Of course I'm trying not to freak out.