I sobered up a long time ago, long before I was diagnosed with a mental illness. Still sober-and grateful for all I learned about sobriety and sober living. I don't know about dual diagnosis treatment places, although I would probably go to one if I were to start drinking again and couldn't quit with the help of AA.

Do you feel like you have tried everything short of going to hosp?
Do you think you need residential treatment for the addiction?
Is your mental illness controlled or stable?
Are you ok with the meds (if any) you are taking for your MI?
Is a treatment center likely to be ok with your meds? I take Xanax as needed; for some reason I am able to take it and not go down the addict path. But I am sure that a residential treatment place would not think that it is cool to do that. I would think, though, that they probably would be ok with antidepressants, antipsychotics, bipolar meds. But I would want to know what was ok before going to residential treatment that was not dual diagnosis.
Do you see a t for other stuff or just the group substance abuse t? If yes, what does that t think?

I'm not asking so that you feel like you have to answer here, those are just some of the questions I would ask myself.