Want another baby!!

My husband and I have a 5 month old baby boy and he is such a joy we love him more than anything but my husband wants our kids to be close together at first I didn't agree but now I have baby fever like crazy! I want another baby so bad but at the same time I want my son to get all my attention he's my baby boy and I don't ever want him to feel unloved or pushed aside! Ah what should I do ladies!!!?