My dr just called and now I’m worried

So Thursday I had my first ultrasound to figure out how far along I am. Determined to be 11 weeks. Well my doctor calls me today and tells me I have a “blood sac” between my uterus and placenta. She didn’t go into any detail about if it was risky or normal so of course I’m freaking the hell out 😩 she just told me no sex until my next ultrasound 😒

Question is, have any of you ladies had this ? I googled it (i know the worst thing to possibly do) and now I’m freaking out

We literally just told everyone this past weekend and now I’m really worried about miscarriage 😫😫😫