I'm aware of the existence of contranyms. None of the examples you gave apply, as they just have different meanings, or the same leaving with different connotations.
No research needed. Getting back to the routine, after a suitable period that varies from person to person, is important. But it is not, in itself, healing, and someone who didn't miss a day of work is not doing well.
That's not healthy, though. That's repression, which is bad for you. I know it's bad for you, as I have not had more than six emotions in the past 20 years.
I'm aware of the existence of contranyms. None of the examples you gave apply, as they just have different meanings, or the same leaving with different connotations.