Is severe depression and demonetization in times of extended solitude a normal human response?

As an introvert myself, I know exactly how you feel... I have to be working toward something, or earning something and if I'm not I don't feel like doing anything at all because it's simply not worth it. I like to play guitar or make music or if it gets really bad just sleep in til 1 and answer questions on Yahoo! Answers or stupid **** like that all day. It will eventually pass, just find something to occupy yourself with in the meantime.