I have little to add to the sound advice already offered but I would add a small suggestion.
Don't be too hard on yourself or expect too much of yourself.
In fact, scrub 'small'. As I think of it, I think this could be quite an important thing to offer a little advice from my own experience on.
I, some 20+ years ago also went through residential treatment for alcoholism along with ongoing support during and after.
Presuming you are happy with the counselling support you are receiving the direction of the treatment you are getting, please don't stray too far from this, even if at times it seems to contradict the dhamma r your practice.
your description of your practice sounds very much to me as if you are 'knocking on the door' of vipassana, albeit separating your observance of bodily sensation to when you aren't sitting. Be careful.
In your seeking for more awareness of your emotions, you could be opening up a faultline that, in terms of your addiction/s, could prove to be dangerous.
Take it easily and go slowly, please.
True meditative practice, particularly vipassana, is not a path to be trodden without wise guidance and care.
The vipassana course I attended a few years ago, for instance, wouldn't allow attendance by anyone with mental health issues as the experiences one might encounter can be pretty powerful, for anyone.
I'm not trying to discourage you in your practice, but suggesting caution.
Vipassana, on one level, can be seen as a purgative for the mind. to handle this, the mind most be strong enough.