Colleen
I am just seeing this thread. I am sorry.
The drugs and mental illness are chicken and egg. Like you say.There are now at least half a dozen of us actively posting right now in this situation.
I for one seem to have a higher education fetish. Because this was what I used to run from my own pain, I believed (wrongly) it would save my son. Nor did it save me, either. When all is said and done.
I would try to not worry about the school. it is not the issue, I do not think.
As far as the tearing up, who hasn't? I cried with prisoners. (They were great experts on difficult sons.)
You are doing this hard, hard thing. Staying present with compassion and love. I admire you. I am sorry it is so, so hard. And scary, too. And sad. I am right there, too.