Baby name issues with family?

Janae
I am having a sweet baby girl this thanksgiving and my husband and I decided we were going to name her JaNell Marie after our mothers middle names... I had mentioned that I didn't want her called Nellie and now my father in law and the rest of my husbands family have started calling her Nellie and the worst is they are even calling her "Smelly Nellie"... If her own family is going to tease her and make fun of her before she is even born should I just change her name? If her family is calling her that I can't imagine what the mean kids at school will come up with.. 
Am I overreacting?