seasonal depression?

I don't know why I feel so depressed lately. I always feel like this around new years and chirstmas n stuff. I just get so tired and sad all the time. the album deathconsciousness just has me feeling like that lately. I started spiraling in my brain today during English and algebra. I just want to lay in bed and never get up again. I want to be back in a hospital bed just reading books all day again. I don't know maybe I'm just being a moody teen, it'll probably pass.