Hello, anyone seen my melody?

I waited for the weekend and hoping to compose something. I had this melody in my head for the whole week but then... when I started my mac, the hard drive was not working... what a nightmare. I end up fixing my Mac for 4 hours, luckily, all projects stayed intact. But then I totally forgot the melody. When it's gone, it's gone. May be it will just come out again sometime when I am relaxed, very relaxed. I was told by my lecturer in cognition science ( yeah, my BA in visual communication was based on cognition science theory). That my brain is actually still processing it in the background. So it should come out again one day.