Baby fever bad!!!

Im 24 I've been with my SO for 8 years now. We own a house together and both have amazing jobs. I have been having really bad baby fever lately! We talk about having kids all the time. He is a year younger than me so I think he may be a little behind but We are getting married next year. Am I crazy for having such bad baby fever? It's so bad that I call my sister and ask to baby sit every weekend just to get my baby fix in! Haha