hee heee Sorry but your story is very familiar to me. Friends of ours rescued a cat they called her Miss Kitty she was a beautiful long haired black cat, anyway we took her and started calling her Emily. We could call and little Emily would come running. We got her into the vet about a week later and our vet was looking Emily over and said we have an Emil instead. Aubrey Jacob (AJ) came home with me that day.
I also thought all orange were males most of the ones I had seen were male but our vet tech said no. I hope your little GIRL gets rid of her worms quickly.