Youre more than likely having identical twins. Its where both baby's are in the same sack.

It may just be one. My husband and I thought (and hoped) for a minute that we might be having twins from our first US, but we figured either the tech would have said something or at least told the doctor who would have talked to us. We are 17w1d today, and there is one perfect little man in there. The first picture is from our US when we found out we were 7w6d. The second US is from 10w2d. Good luck!

Looks like it I think I'm having twins too the person couldn't say anything either cause they aren't doctors

I had mine today and had 2 things in my uterus. Tech said not twins, it's the baby and the yolk sack. They are both on the bottom of this pic. Yolk sack is to the right and baby to the left. I'm guessing that's what it is since your thing says your 6weeks and some days? Not a pro just what mine said and looks similar