In an ultrasound, what could the black spots on my ovaries be?

So, I thought I was pregnant and went to the doctor and he took some blood to be tested. A week later I had to go see him for an ultrasound and we found out I was not pregnant right there because there was no baby, just about 6 black spots on each ovary. The doctor told me that he was testing for polycystic ovarian syndrome and that is what he thinks it is. Today (5/16) is a week later and the nurse called me with my bloodwork results. Every thing (my glucose, thyroid, and insulin levels) came up normal (except for the preg test which was negative), so I asked the nurse what this meant and she had no idea, but that it probably wasn't poly-cystic ovarian syndrome. She said she would have the doctor call me, but its too late now and I don't want to wait for tomorrow. Does any one know what this could be. Please help! Thanks!