Help!!!! 6 weeks and empty sac


Last week I had an ultrasound measuring around 5 weeks on the ultrasound just showed an empty sac. Dr seemed like the was pretty common for that early. After that we did blood work for the next couple of days. My first draw was 1483 the next draw which was 48 hours later was 2196 so it did not double and only rose by about 60%. Because of this she decided to repeat the ultrasound today. The ultrasound again only showed an empty sac the Dr didn’t not seem very hopeful by this and we are taking another blood draw again. However the gestational sac did get bigger last week is was at 3.4mm and today it was 9mm. Has anyone had anything similar like this happen with a positive ending?