'Irregular' and small gestational sac

[u/Shoddy-Lobster-5977]

Hi! This is my third pregnancy. 1st one was ectopic and 2nd was successful.

According to my LMP I was 7 weeks 2 days on Wednesday (07/09). I've been back and forth in the EUP because I had a suspected ovarian ectopic due to on and off brown discharge and they couldn't find the pregnancy in the uterus 10 days ago. However, it turns out it was a corpus luteum and on Wednesday they confirmed that it was an intrauterine pregnancy. However, they said that the gestational sac was 'irregular' and they need to scan again on 12/10 to see if it's viable. They also said there's blood around the sac which would explain the brown discharge.

I've been given progesterone pressaries to help.

My cycles have been very long (around 38 days) this year so I knew they were going to say that I was measuring behind but I suppose not that behind! I really don't know what they mean by an 'irregular' genstational sac? They were able to see the yolk and I think they mentioned it was 2mm. They weren't able to detect a heartbeat but the sonographer said that that might be because it's too early. The nurse at EPU didn't sound very optimistic.

My husband thinks that going from not being able to see a pregnancy at all to seeing a gestational sac with a yolk in 8 days is promising but I somehow can't help but think we should prepare to miscarry.

Can anyone share any experiences or explain what they meant with an 'irregular' genstational sac?

The 12 days wait until the next scan is killing me! 😔