George, I was off for six months due to anxeity and depression. I saw a psychiatrist and was able to get paid from short term disability. Currently STD is 60% of your base pay. You must pay taxes on std but I was below the tax line that year, because of my deductions, that I got all taxes paid, even state, refunded 100%. If you do go out under anxiety/depression you can NOT go to your family doctor. Read the back of your card. It tells you substance abuse mental health issues are handled by a different carrier than BC or Aetna. The company is Solutions, but also uses another name.
There is no sence in taking an unpaid leave if you are really disabled due to high stress and anxiety that is on you due to company policy or management in general.
If you e-mail me from my profile, I will give you my home phone number. You can then call me and I will try to help guide you through. Right now I am out on comp due to recent surgery, so you could call during the day. Please don't take this as a joke, I have helped many drivers in my center because I seem to retain useless knowledge about UPS.
Either way Good Luch. D