My last ex died three years ago, so if I saw him coming out of a health clinic, I'd be going to an eye doctor.
I would wonder how I was diving, since all the health clinics are surrounded by more buildings, not water :o
Worried about what? I gives a damn about the ex wife.
My last ex was fifteen years ago, so-no
Yes. I'd probably text or call them. If I cared about someone once, that person is still in there... and I'd want to make sure they're okay.