Disappointment

At current i'm working on a photography based project taking snapshots of people's everyday life outside unchained supermarkets and convenience stores around the outskirts of London. The images I was collecting seemed to be great. The subject was extremely interesting and I spent along time waiting and walking to find opportune moments. Today however I went to collect the developed photos and to my horror not one of the photos had been exposed, the shutter had jammed. I have lost every image and a number of hours of my life. I want to set out and photograph the same spots again but to be honest I've lost heart and really can't be bothered, I haven't got a choice though because I need them and the subject interests me so much.