You sounds like you are in need some "me" time. Take out even an hour or so, when DP can look after bubs to just have some time on your own to recharge.

Dont do the shopping, or chores.. Do something for yourself and dont feel guilty about it!. Sleep, or go out and have a coffee somewhere nice, and read the paper or a trashy mag, if you have the time, maybe a massage or pedicure.

Your doing a great job.. but just remember you need to look after yourself as well