Although it is possible that your queen, Zsa Zsa, may be experiencing a false pregnancy, I'm more inclinded to believe that she is pregnant. A queen should have come back into heat by this time according to the dates that you have provided.
With her nipples pinking up and the hair lost around her nipples, it appears her body is preparing for her first litter. Please watch her carefully for any discharge and maintain a good source of nutrition for her litter. I would cater to my girls during their pregnancies and found cooked chicken was a favourite. If her appetite has increased and she is becoming very affectionate with you I would suspect your male was successful.
If you have any further concerns please contact me. If you have any concerns about Zsa Zsa's health, a vet check would be strongly advised.
Please keep in contact with us and congratulations, you will truly enjoy the experience of being a registered breeder.