Amniotic cyst

Erin
Hi Ladies! 
I just had my 8 week Ultra sound yesterday and the doctor found, what he thought may be, a cyst in my amniotic sac. He didn't seem worried but scheduled me for another ultra sound in two weeks. He said it might just go away but he couldn't tell what it was attached to cause everything is so tiny right now. 
Has anyone ever had this? What was the outcome? 
Thanks for your feedback in advance 😉