Depression yes.
Suicide? nah, maybe by an mix of heavy usage of MJ and some other drugs.
Thing is, all the thoughts comes back at once, you cant focus your mind on anything else then the troubles you have at the moment...
Dreams etc come back heavy, and they can be a ***** if you havnt had a dream for 6+ years...
But with Mj you get normal after about a week or two.. but Herione.... I dont know about making it on your own with Heroine...