How do you get out of a period of being "down in the dumps"?

Not depression. When you feel like you’re waiting for happiness in your life but you don’t know how long you’ll have to wait, what to do to get it, or even what you’re waiting for exactly. And you’re just overcome with sadness and a feeling of helplessness. Sometimes even restlessness.

Sorry if this sounds depressing or brings anyone down. I’m just kind of confused about what’s going on and looking for some help. Thanks for any helpful input.