AM I being unreasonable?

I have a 2 year old boy and I start work at 9AM. The problem is it is now 4AM so 5 hours before I start and my boyfriend (who is the dad) is still not back home despite telling me he would be back home for 12AM from a night out. So he's gonna have to get up with my sn in 4 hours which is know will be a bloody struggle and I might even have to phone in sick for work if he can't get up because he is definetely drinking tonight. I have already had to phone in sick before for the same reason and am worried I will lose my job because he is being irresponsibile. Am I being unreasonable in being extremely annoyed with him and seriously considering packing his stuff for him to leave?