So I found out i was pregnant a week or so ago(5wks), I got 4 ultrasounds two abdominal and 2 vaginal in the e, r.according to the doctors my hgc level was high enough for me to be in my 2nd trimester but after 4 ultra sounds within 30 minutes there was no baby, barely a sac so they scheduled me an appointment to go to the ultrasound tech the next day and she found a sac and also seen a little seed, just got a call today talking about my blood hormone level that its 45000 and they want me to come in for another ultrasound to make sure everything is fine and im a mess of emotions in this moment im currently 6wks and 2days today and I want to know is this common or should I be worried ?