Belly button infected?

Brittany
My baby will be 3 weeks old on monday. His cord fell off at about 2 weeks, but i changed his diaper this morning and noticed hos belly button is very red. Doesnt smell funny, but i dont know what to think? Ive been cleaning it out with q tips, but can i use neosporin or anything on it? Im a ftm and really have no idea Bout this... thanks for any help