Ever had this feeling?

Some days, you feel things are going alright - the way you want it to be. Doubtless about what life is all about. You feel light, contended, and happy.

Some days, you feel otherwise. That's when you feel maybe things aren't that right afterall. You feel lost, confused, and unhappy.

The latter's how I'm feeling right now.

Mood swing perhaps?
(My menstruation has just ended - does it explained?)