Dates making no sense... help please!

Re

Hi, really hoping someone can shed some light...

I’ve been trying for another baby since last May. Had three miscarriages since last September. All pretty early apart from a blighted ovum we had to end with an op cause it didn’t go on its own.

Now my last period started on the 7th May, after a chemical pregnancy from April. It only lasted three days, but anyway.... I had a positive pregnancy test on the 3rd June and also one of those digital ones on the 10th June which said I’m 3+weeks / 5+weeks pregnant.

Having had ‘suboptimal rise in HGC levels’ in the pregnancy in Sept last year, that made me be quite hopeful and we went for an early scan last Friday. They only did an external scan and said the sac is empty and it looks like a 4 week pregnancy.

According to the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> at that point I would have been 6 weeks 5 days. So today I went for another scan cause I feel so nauseous and thought if it’s another blighted ovum, they can help somehow to move it along.

They said the outer scan showed nothing - but the internal scan showed a fetal pole of 2.7mm and a yolk sack, all looking ‘promising’ and ‘in good shape’. The consultant said the next scan in a week should show the heart beat.

However, because of the dates I’m really confused and worried it’s not going to have a heart beat next week - because I’m basically two weeks out of range!

I know we were trying around our mid cycle mark (22nd May), so even if you add a couple of days on, it still makes no sense to me.

Feeling like I’ve got a pregnancy brain right now, I could see this all wrong, but the app here says as well I’m 7weeks 5 days, yet the scan today puts me at 5 weeks and a few days. Would that mean the pregnancy is not developing fast enough and will stop/end in another miscarriage?

Anyone got any ideas on this?

Thank you!!!! 🤗🤗🤗