I also will be trying to find a 55 and older place, now. The nightmare experience I'm in right now has me feeling very unwilling to live among younger people, among other things (I'd like laundry access, a bathtub, an elevator, etc.)

I think for the way you're feeling, it's probably a transient mild depression. I've been feeling that way for a few years now though, I think because of benzodiazepene withdrawal syndrome, and the negative symptoms of schizophrenia. You don't have those issues so very likely it will just pass after awhile. Good luck with the sale of your condo.