Don't be too hard on yourself, Sal. Even if you are a two-bit, lazy, no-good, do-nothing, I still like ya'!
Seriously, do talk to the doc about the ADs. Zoloft just plain up and quit on me one day after about 8 years. I don't know why and no one else seems to know. I switched to Paxil 4 yrs. ago and will take your note as a flag to watch for my own, next decline.
I think this junk puts a lot of valleys in lives that are otherwise rather smooth and controlled. I hate the not knowing what will be the next adventure.
Have you gone people watching lately? Now that the weather is a little more tolerable, maybe you could become one of those coffee shop fixtures who enjoys some kind of eccentric royalty at the retail level.

I met Jeff Daniels when we were both doing that at the same little sidewalk cafe. You have the vim, if not the vigor, get out there and yell at a few little kids just for fun!