I'm so lost on what to do

I (34f) am 6 weeks pregnant and my boyfriend (32m) is going through a relapse cycle, and I'm lost on what I can do/say to help him.

He went to detox for a week in early September, and he stayed sober for a month. He was suppose to set up therapy sessions, but he never did. Then he drank heavily before showing up to work about a month after that and got called into the office and questioned, and they tried to help him instead of firing him. He stayed sober for another month and a half after that and just did the same thing today, but didn't get as drunk as last time, so they never questioned him.

We work at the same place. I work first shift (he works 2nd) and every day I worry whether it'll be the day he shows up drunk again. I don't know how to help him at this point. Every time it happens I suggest therapy or really anything other than nothing.

Anyone have any advice or suggestions on what to do, if anything?