?? Help

Brittedee
Went for my first ultrasound today 7w4 days only to find out the heartbeat was at 65bpm OB says to expect to Misscarriage but question is there any hope of it surviving if not how Long untill I start to bleed and how painful will it be as I have a almost 2 year old and I don't want to be incapable of looking after her with pain as I live alone with her someone please answer ?