So angry!!!

I am actually fuming with my partner right now!! All week I get up with our 5 month old daughter at 6 in the morning while he stays in bed till around 10, and he sleeps next to her every Saturday while I get some sleep, but every morning on the Sunday he goes in the front room to sleep to leave me to deal with her at 6-7am. This is so unfair on me! Im on medication for post natal depression that make me really tired and he is not helping me at all!! I feel so down today but I know if I talk to him it'll end up in an argument. :'(