Do all guys think like this??

Okay i'm due in 5 weeks and everyday my boyfriend which is the father seems to get more bitchy. When I ask him what's wrong he says he's mad because we won't be able to have for 6 weeks after I have the baby.And when I mention the baby he seems to get more pissed. I mean come on shouldn't the birth of your baby be more important than ? I'd like to talk to him about it but I don't know how. Has anyone else had this happen, if so what did you do abut it??