Sounds like it could be depression or seasonal affective disorder (SAD) both of which are very treatable and can become very serious. You might want to make an appointment with your doctor and just let him/her know.
Lately, I haven't been feeling right. I don't know how to describe it. I am fine if I am distracted but when alone, I just feel like something isn't right and it makes me sort of sad. It's beginning to get on my nerves. Does anybody know what this is?