Moment of reflection?

I've found myself getting despressed since yesterday, mainly about my lack of achievements. Because I'm like that, and I've always expected more from myself - but the last 4 years have been beyond what I imagined.

I guess it's in our moments of loneliness that we think about these things. We think too much. I wasn't too busy last 3 days, so that's the main reason I got to this depressed stage. But what happened happened, I need to meet my own expectations and keep up with my progress in order to be truly happy.