Concern with sonogram today 😣

Allison
My moms friend does ultra sound and did one for me today, I've been told at 10/11 weeks I have placenta previa and today she saw would could placenta previa but also space between my cervix and where the placenta is right between them she couldn't tell if it was a pocket of fluid or a pocket of blood there 😖 I have to go to the hospital around 20 for being "high risk" due to my 1st child being born 5 weeks early due to preeclampsia and she wants them to double make sure to see if it is blood or fluid. 
Has this happened to anyone before??Â