I am stressed. And worried.

Yesterday we had our routine, every 3 weeks ultrasound, due to a marginal cord insertion into the placenta. I will be 38 weeks tomorrow. Yesterday they discovered one of the baby's kidneys has stopped functioning, I now have polyhydraminos, and baby's belly is in the 97th percentile. I can't stop worrying. I see my doctor on Friday to discuss all of this and the plan of action. Anyone have something similar happen this late in pregnancy?