10 weeks but measuring 8w5days

LL

Hoping to hear from ladies who’ve had similar / different experiences to mine below:

I track my ovulation and temps quite regularly and basis this data I ovulated on 1st Jan, and conceived in that week. By that data I should be 10 weeks. My first scan showed baby with a good heartbeat (doctor also wouldn’t say what bpm was as this was a pre 12w scan...???) but measuring at 8w5days. Initially he felt it was 7weeks.

I’m super concerned because it’s not just a few days but a week and a bit out. I’ve had a miscarriage before and reading on the forums I see some women have gone on to miscarry babies that are not growing optimally.

Has anyone else had similar/ different experiences?

My next scan is only on 2nd April. Doctor didn’t seem worried at all. I’m also doing translucency on 01st and Panorama next week.

Help... I’m a little worried! Thanks ladies