Tired

I'm not sure if it's just the way it is, or PMS, but some strange mood is taking hold. I told feel sad exactly, but not really happy either. More like apathy and melancholy mixed together. I'm not concerned that I haven't done any of the things I need to have done today. I know they are important, and on some level I want to do them, but I just can't bring myself to. I want to sit in the sun, but the gumption to actually do it escapes me entirely. I just want to sit and literally do nothing, and I don't know why. Perhaps I'm just tired.