Went in for my first ultrasound at 8 weeks 5 days and things didn't go well...

When the Dr did my vaginal ultrasound she could see the yolk sack but no baby!! Needless to say it hurt really bad. She's having me do more tests tomorrow and I'm going back to see if my HCG levels have risen and the posssibility of my baby being there. I don't know what to think! I was having all of the pregnancy symptoms all tests back positive even blood work. 
Has anyone gone through this? Or do you have any advise? Please keep me in your prayers.