I've had such a lousy day......

Today I locked myself out of my room....again....this is like the 3rd time I've done it in 3 weeks....The first time was 2 weeks ago just when I came back from jogging and was going to take a shower....had my towel and locked my door....as I watched my door slam I realized I didn't have my key....Then there I was...sweaty and topless and locked out....Luckily uni students don't sleep so early and I was able to borrow a shirt from my kind levelmate so that I wouldn't shock the hell out of the female resident assistant on duty that night...lol....imagine her reaction if I knocked on her door at 1.45 am without a shirt...lol.....Then last Saturday I locked myself out again....And then today....waited for 2 hours for the damn door to be opened....I'm so mad at myself now....why am I so careless....lack of sleep perhaps...just like in the movie "The Machinist"...Wasted SGD$30 in fines for my carelessness...talk about money down the drain.....