winter blahs?

I dont know quite what is up with me, it seems my sleep patterns are core off and my eating habits as well. I feel really tired and drained most of the time. I know all those symptoms could be depression but it may just be stress hitting me way harder then usual. Generally when im stressed I just tend to sleep a lot and I mean A LOT I remember last year I slept 28 hours in two days. Now I am sleeping a lot sometimes and then other nights im having some bad insomnia. Also I can barely eat any more, and when I do eat decent meals I feel sick. I know I was feeling sorta fat so I was trying to cut down on portion sizes. So I dont know if that is just an extreme reaction to that or what. And most of the time I really dont want to be around people, which is okay I mean ive always been an extrovert but its not bad to take some time to rest and not be with people but then when im alone I feel really dejected and worn out. Arg. I really hate to be like this. Its not like my life is so rough I should be fine, I have a great family, awesome friends, and a kickass boyfriend, I love school (even though it does tend to be rather stressful) and I love my house. I am having some financial difficulties at the moment but still. I wish I could just get over this.