Thanks for the input guys. I've managed to retrieve all the info I had saved in 'notes'. I hadn't originally locked 'notes' in the 'app-locker', I just had it open in the backround. So my main concern has been solved by finding all my info, my only problem now is that my 'notes' icon doesn't work, but I can live with that.
Thanks for your time guys, it's reassuring to know that I've got a safety net.
Cheers.