Threatened Miscarriage

Went to the doctor friday because i was bleeding so bad and they did a vaginal ultrasound and they confirmed my pregnancy only that they couldnt find a heartbeat.. Me and my boyfriends heart dropped. We became terribly scared. They said it could be that im too early but they want us to come back monday for my 7 weeks to check for the heartbeat again but until then im on bed rest. I hope everything goes okay on monday. I been bleeding like im on my period but not as bad. But im so scared but im just going to pray and hope for the best And try not to worry and stress.