Hi Leslieslsa,
Oh Kmart can be a very stressful place to work at Christmas time!

I used to work at a Kmart store. I remember one year I was on the Service Desk on Boxing Day, and there was literally a wall of people outside the doors waiting for the store to open so they could return all their unwanted junk!
Don't feel badly about the situations that stress you - sometimes life is damn stressful! It's okay to have setbacks; some days it will be more difficult. Instead focus on what you
can do.
One day when you don't have to be anywhere else, see if you can go for a drive. Maybe drive somewhere nice like a country road if you feel like it. Set little challenges for yourself, such as trying to drive somewhere new or further away, and feel proud if you can meet them.

Going back to therapy sounds like it could help you. Maybe your therapist will have some good advice.
No diagnosis, lots of opinions, and a bunch of issues that I haven't quite figured out.