Ultrasound!

Last night was super scary i started bleeding and i broke down crying, i just can't go though this again was all i could think about. I decided to go to the ER since i'm far enough along to see a heartbeat or at least the gestational sac, yok sac and fetal pole. So we get there and the bleeding slowed, they were not going to do the ultrasound at first but after some sweet talking he changed his mind. The only thing was the did it abdominally so they weren't able to see an much. Well it payed off that i'm thin cause they saw everything. They couldn't see a heartbeat though which i expected them not to anyway. So after 2 hours they couldnt' find out where the bleeding was coming from and i was told just to go to my ultrasound appt today and follow up with them. So i get there today and i tell my Dr about the ER visit and the bleeding slowed down a lot to just spotting. She was llike ok let see what we can see on the ultrasound. She does the vaginal ultrasound and right away there was a beautiful little heartbeat! I was so excited tears came to my eyes. The baby was measuring a little behind, i'm supposed to be 6 weeks 5 days and little boo measured 6 weeks 1 day, but then again last night at the ER little boo was 6 weeks 2 days so i guess it just depends on who does it. Baby looks great and they still can't find where the bleeding is coming from. I was told to call and go to the ER if its starts cloting or cramping. So please say a prayer for us that little boo is ok!!