Abnormalities in filling of uterus??

Kristin • Momma & Wife
I had an HSG done Friday to check everything out and my dr just called and told me my Fallopian tubes are clear, but the radiologist noted that there were abnormalities in the filling of my uterus. My dr was very vague on this and said he was going to be on vacation and I need to come in on Nov 5th to get an ultrasound with saline done. Has anyone else encountered this? What does that mean? I just hate having to wait so long to get more details :(