Depression

I think I have fallen into a deep state of depression. Life doesn't have any meaning to me anymore. My whole reason for being has left. I keep working because I have to, but it isn't any fun. I used to love my job and watching new life come into the world, but not lately. It is just a job now. I hope this will change.
I haven't had any ambition to do any thing. I haven't scrapbooked or done any other crafts as I just can't bring myself to do it. Like I said, no ambition, no reason to do it, no energy. I just sit in a daze or want to sleep.
I keep doing Chemistry as I know that this is something that I have to do and it has a deadline. If I hadn't paid a lot of money to take the class, I wouldn't do that either.
I'm tired of living this way and hope things change, but for now life just sucks and I don't want to do it anymore.