I guess it really isn't that important, I'm just wondering what constitutes a mood swing. Does it have to be an erratic, drastic change in mood, from one extreme to the other? Throughout the day I go from "ok", able to ignore my depression & anxiety long enough to function, maybe even crack a smile; to I-just-want-to-be-left-alone-to-die depressed. It may not be a extreme change in mood, but it's enough for some people to notice. "You seemed ok an hour ago." - But for me ok is still dying inside, I'm just able to not show it on the outside. Should this be discussed with my doc, or is it just a norm for depression?

((((wanderer)))) welcome to DF!! it is so good to meet you!! i think anything that is worrysome or bothers you should definitely be reported to a doc... i tend to be the same way... ok in the am and it gets worse at night to the point where i can't cope... or sometimes it can be within hours as you are describing... i would definitely call the doc...
best wishes
bijou

Those are definitely mood swings. It doesn't have to be anything extreme or drastic or incredibly erratic. Just the fact that you notice a change and those around you notice a change in your mood constitutes a mood swing. And if it is happening several times a day, every day or several days in a row like that it definitely needs to be mentioned to your doctor.

The whole idea of "mood swings" is so subjective to begin with, I don't believe there's a clear or absolute answer as to what they're all about. I do believe everybody gets them, it's just that some mood swings are more extreme than others.