Too soon??

So question to the fathers. My husband and I just had our first born almost 6 weeks ago. My husband has been an amazing help with the baby. Most nights he stays up to feed baby at least once or he will wake up early, other times he is just too exhausted from work and sleeps through the entire night (which I understand). He stayed home the first two weeks with us. The week that he went back to work, he went out twice with his friends. The first time, he came around 7pm which is good. The next day he went out again and came home drunk. I was pretty upset because we have a newborn who needs constant attention and I need help. The following week he didnt go out, but the week after that he went out again. He came home slightly past 11pm. He wasn't drunk but had been drinking, so he got home and passed out after he had said he would help me out. Now today he is put again. I expected him to be home around 11 or before then, but he got home slighrly past 1am.... I keep telling him that it's okay to go out because I understand he needs a break but he also needs to be reasonable wih timing. I'm home all day with baby and I also need a little break. I don't think it is okay for him to be out for 6+ hours while I struggle. So my question is am I being unreasonable or is my point valid?

A little back story: Before and during pregnancy he would constantly go out. 1-2x a week and would come home drunk 95% of the time. I thought that seeing his son he would have a wake up call and realize what he was doing was not okay. Yes he has somewhat stopped but not so much... I hate to be the nagging wife but I honestly don't think it's okay. I believe he needs to be reasonable and wait a bit until the baby is older. But I might be wrong?