It's a good sign he was able to quit drinking. He is probably full of anxiety now, though, and the responsibilities of being a parent may be overwhelming. Do try to get him to counselingl, whatever it may cost. There may be community health resources available on a sliding scale basis, based on income which may be affordable. You don't know till you look. Do encourage him to also post here and see if he can get some help. Encourage him to adopt an identity unknown to you so you won't know which posts are his and he can get some independent help from others.

Good luck to you both!