First U/S 5weeks

Hi ladies!

I know it’s early but I’ve had a MMC back in December around 8 weeks, my U/S showed a sac but no baby.

I’m currently pregnant w/ my rainbow and I’m 5 weeks. We’ve had an U/S today just to check if it isn’t ectopic. There’s a yolk sac but could not find fetal pole. My DR isn’t worried and scheduled me to go back next week to check again. I’m a bit worried now and just wondering if this has happened to any of you ladies?