Working on my last nerve!!!!!!!!!!!

Well here we go again. I know that I should log in more often and post, but it has been a very busy five or six months since I last posted. I have had my knee surgery back in January. I had to go through 3 months worth of physical therapy to get to a point that I could return to work. I finally get to go back to work in April only to be told that I will not be going back to the Paint Department because we are short-handed on the amount of cashiers. Well instead of hiring new cashiers, I am stuck on a register because it was what i was doing when I first joined the company 3 1/2 years prior. Don't get me wrong, it has made the transition of not doing anything all day to actually being able to work so much better, but I have my limits. I feel like I am in a prison cell without walls, but heaven help me if I cross over that invisible line. It is like a dog getting shocked with a shock collar for going out of its yard. And to make matters worse, a head cashier position came up and no one was notified. I came into work on Monday to find out that a cashier who has not been with the company as long as myself, gets hired as a head cashier. OK i can understand if you don't give it to me but there was one other cashier that was more qualified to do the job and she did not even get asked. That is pure B.S. This place is wearing me very very thin. And when i go on my vacation, and i like were i am going, i may not come back for the simple fact it is that store. The company is a great company to work for. It is the upper management of that store that blows.
Ok I think i have that off my chest now. thank you for listening to my little rant!