Early ultrasound

My doctor gave me an early transvaginal ultrasound today, even though I know I'm 4+6 and she couldn't find a sac. She wasn't reassuring and just said we'll do bloodwork today and check in a few days if it doubles. I won't get the results for a week! In the interim does anyone have any stories of this happening to you that will help me relax because I'm so worried! Thanks!