Why do I feel this way?

My entire life I wanted to be a mom and I always imagined myself having a daughter. I'm 23 years old and I just had my third son at the beginning of March. With my first I didn't care what I got and was so excited to find out I was having a boy. My second I was a little disappointed at first but got over it quickly. With my third, I bawled. I still love him and my other boys more than anything of course. And I know how blessed I am just to have these babies. But I'm only 5 weeks postpartum and I already have major baby fever and I think it's just because I'm desperate for a daughter (which I know isn't guaranteed of course). I just feel like, as much as I love my sons, I was meant to have a daughter. I cant picture my life without one. My third is my boyfriends first and as much as he loves him and my older two he's pretty sure he doesnt want anymore. Honestly there have been some recent problems in the relationship anyways so I dont even know if that's something I'll have to worry about forever. But I'd like to know if anyone else feels this way? I know I need to wait quite a while before having another (none of my babies were planned, my second and third were conceived on birth control) for financial reasons as well as giving my body a break. But it's like even though I know that logically, my body and my heart just dont want to wait. Someone please tell me I'm not crazy and please give me some tips on getting rid of or distracting baby fever. I dont even know how I have it considering all my boys are under age 5 and my newborn is a very difficult baby.