I don't know if you have tried frontline but there are also many herbal remedies you can try as well- sprays that are safe for her- try this link
http://www.earthanimal.com/natural-f...-products.html you don't want to overload a baby with toxins. Also you can get a metal comb and have a small cup of rubbing alcohol on the side- comb your baby girl and the fleas usually stick in the comb- when they do kill them in rubbing alcohol and keep combing- if you do this once or twice a day you can usually get them- it's easiest to do it when your baby is sleeping. I grew up in South Florida and this really helped with the fleas- just keep the rubbing alcohol cup far away from your baby girl- good luck!!!