Am I selfish?

My husband called me selfish for saying I wanted a day off from our son... He works(off for now), and I have my son 17+ hours a day when he does go to work. He goes back to work soon, with more hours(will be away 2 weeks at a time for now) and it will be just our son in I in our new home...I just want a day for my self...am I selfish...?