I found her dead this morning, unfortunately. I checked the tank and made sure that there were not any sharp objects. There was not any aggression among the fish. I still don't know what it could have been. The red dots seemed to swell a bit too. Possibly parasites? I took pictures before I flushed her but I can't find the cord to transfer them to my computer. As soon as I find it, I will post pictures if needed. Should I treat the rest of the tank, since her babies along with the rest of the fish are in there?