I just got a new Sunburst platy from PetSmart. She is very happy in my new tank along with a fancy tail guppy and a bumblebee platy. The only male is the guppy, so none of my plates can breed... My Sunburst platy looks small and I do not see a gravid spot, I'm positive she's female. She does not look pregnant at all.. Could she be pregnant from the other males at petco??