Cody just isn't a good sleeper. I have been surprised lately to learn how many other moms have similar kids. My oldest was not a good sleeper either. He never could cry himself to sleep - the attempts just traumatized him and made sleep more difficult. So I can't do that again. We resorted to whatever worked for us all to get needed sleep which seemed to be a family sleeping room. We didn't plan it that way.
Anyway, Kyle sleeps fine now, but he is a light sleeper. I know Cody will get better at some point too. So, for all the tired mamas, get your sleep however you can!