What a Stupid Thing to go and do!

I've just got back from work. It must be the second shortest night shift that I have ever done (the shortest one being when I was suspended, which was at the start of a shift).
I was not looking forward to going into work as I was expecting it to be as boring, frustrating and pointless as the last 3 shifts. I got there and someone else, who has only been there for just a month, was saying how s**t the place is. Then as I finally managed to find my way to my first position (one that I haven't covered at all yet) they radioed me to ask me to go to back to the control room. I made my way back to be told I was to do a patrol. It is stuff like that, the lack of organisation, that contributed to my hatred of the site.
I was feeling fragile anyway, I'd had a depressive episode in the afternoon for no apparent reason (other than the thought of going to work!, and while I was doing this patrol I just felt worse and worse. I finished the patrol and then went to the changing room, and just stood there for 15 minutes staring into my locker trying to think of a way I could cope with another 11 hours of the shift, and I couldn't. I was almost in tears, the only thing holding me back was the thought of one of the other guys catching me crying (pathetic I know, I wouldn't care so much if someone I knew caught me, but stranger which they all are still, never!).
I eventually decided what to do. I had seen that the security manager was still on site and so decided to go and speak with him. I got to the control room and he had just left. I nearly lost my resolve, but then asked to speak to the shift manager and told him that I had to leave. That I had to quit because I couldn't face working on the site anymore. He asked if anything had happened, and I said no, but that I suffered from depression and it had been a bad week and wasn't the right time to start a new job. I could barely speak as I was trying to hold back tears. I handed him my radio and passs, got my stuff and he escorted me out of the building. As soon as I was out of the door I felt better, almost good enough to go back in, but I knew that would not work!
I am at home now and I really do not know what I am going to do. I have some money from my last job to come on the 7th March and whatever, if anything, this place decides to pay me for the last 3 shifts! Then I am stuffed! But, I honestly had no choice. I couldn't take working there any more. I need something more.

I have too much sand, no pebbles and not enough golf balls in my jar, and it is weighing me down. (See earlier post today for an explanation!)

I really am stuffed! Who is going to employ me now? A sacking and a quitting on my record within a year. I am so stuffed!