13 weeks with sudden yolk sac

Hi mummies, for the past 2 weeks i was grieving over my lost baby. Cut story short, I was in my 10 weeks when i get to know i had a miscarriage, will all the bleeding and clots. Went for 2 scans @ KKH, only present was empty pregnancy sac, doc says it might be 100% miscarriage but no medicine was given because she wanted me to get more scan to double confirm the miscarriage. However today, i went for a scan, at my 13weeks, the sonographer spotted a yolk sack about 5weeks whereby my other 2 scans were only an empty sac. I am not putting any high hopes but at 13 weeks after going through all the “period kind of bleed”, now then i get to see the yolk sac. Has anyone experienced a situation like i do? ☹️