Yolk sac no feral pol

hello, so I had my first faint positive pregnancy test on the 24th April then on the 26th I got 1-2 weeks on a clear blue

I booked an early scan when I should of been 7wks+1 where they could only see the yolk sac

I booked another scan with a different clinic 10 days after which was yesterday and I’ve had the same again only the yolk sac was present although the gestation sac has grown from 9mm to 15mm

The lovely lady has booked me in again for the 3rd to know for sure what is going on and if I might have ovulated early or if I’ll miscarry

Need some advice, stories ect good or bad but as you can imagine I’m sat googling everything I can and not really sure what the out come will be please comment if you’ve experienced this too and what happened

thank you in advance Holl x