Looking for positivity

went for my first ultrasound today and as of right now...

IM HAVING TWINS!!

On paper I’m 6weeks2days but I’m measuring 5weeks and 4 or 6 days? With baby A

And baby B is measuring about 5/6 days behind A.. we will know next week if baby B is viable or not.

Has anyone that has had twins had one measuring behind at first?