Hi 7Wallpaper7
I think as Leed says, its good to get things checked out with your doctor first to make sure that there is nothing biological going on and whilst you are doing that there is no harm in logging your moods in a diary or journal to help give you some insight about what events affect your moods for the worse or better.
Your feelings are there for a reason it doesn't matter that you haven't got a terrible life to account for feeling so bad but there is something about how you write that makes me think you feel unimportant or not heard by people in general is that the case?
I understand the feeling bad for an hour and then being okay again, when I feel like that I understand that I am a bit like a simmering pot and for that hour I boil over and overspill and then once I have done that I gradually get back to simmering again. The problem with that is the emotion overspills when you get to crisis point but you perhaps struggle to identify with emotion at other times which means that you are not able to look at the emotion when you are feeling better and rationalise it so it just keeps going round in a big circle. You say that this has been going on for 1 1/2 years is there anything that happened at about that time that you can remember that might have set this off?
My thoughts are with you 7Wallpaper7 take care