Nicknames...

So I had my daughter almost a month ago... Her name is Joy Joaquina and my boyfriends sister and mine and a few other people call her JoJo... I don't hate the nickname but for some reason it bothers me that they don't call her Joy the name I gave her!! It actually really bothers me.. do you think it's hormones or what. Will it grow on me. I sometimes call her JOJO but for some reason it bothers me when others call her it.