Since I was very young I've had problems with my mood. I've never really felt happy, I started self harming when I was very young, had disordered eating from pre teens which progressed to a full on eating disorder around age 20. (I stopped the behaviours when I became pregnant at 22 but now, at 25, am really struggling with this again). I have periods where I feel great, get loads done, feel sociable, happy, positive, make plans etc, and then I'll crash and feel so low I can barely move.
I will feel utterly nihilistic and unable to see a way forward, unable to see anything positive about myself or my life, other than my daughter. I can just about put some food together for her and do what she needs me to do on a basic level but find it difficult to leave the house, just put the tv on and sit motionless on the sofa.