I almost forgot to mention: Although my shortness of breath seemed to ease today (I walked the dog down and up a hill!), I reported it to Dr G. Upon physical exam, I had no pain in my right side, even with him poking me in the side and my taking deep breaths. Dr G asked me to have a chest xray, which I took this afternoon. I also had the oxygen level in my blood checked with a pulse oximeter (the thing that goes on your finger) and it was at 96%, practically normal.
Maybe it was anxiety about the ultrasound report?