Need some help !

Brianna • Mommy to a princess . happily engaged to the love of my life . looking for mommy friends .
My period is abnormal .. so last month I didn't track it . I figured it was around April 16 I would of been 7 weeks today . I just had an U/S & they couldn't see the baby just the yolk the sac measured around 6 weeks . She said she thought she saw a lil something but wasn't sure. I'm going crazy I'm so scared has this happened to anyone & pregnancy is now healthy ? 😭😞