Maternal fetal medicine

Hi- At my 20 week US they had trouble seeing babies brain due to positioning. I just had my repeat US at 24 weeks and they still had trouble seeing it bc baby’s head was behind my belly button which was casting a shadow. So my doc is sending me to specialist for a better US. I’m just scared maybe she isn’t telling me everything and maybe she actually sees something worrisome. Anyone else go through this. The wait for my appt is going to be torture 😫