What you are describing sounds just like the normal ebb and flow of being a human. Not every mood fluctuation is one that qualifies for bipolar. "Nons" of course have good days and bad, that can be completely dependent on circumstance. Or they can have moods that are more random, thats just what happens to humans, chemicals are constantly changing in our body so moods are too.

Bipolar describes people whos moods are to the extreme. Everyone has mood swings. It is only bipolar when it is significantly impacting your life and happening randomly unrelated to life stressors. The people who have mild "bipolar" in reaction to lifes stressors are usually not bipolar at all. They just need to learn how to deal better with the events in their lives through therapy or support from peers. There are so many people who use bipolar as a buzz word and excuse for their silly behaviour.

You might see people commenting they are buzzing or high from caffeine too. Just look at how many "bipolar" people drink energy drinks and wonder why they are feeling "up" and having crashing lows after a few days of being energetic.

Bipolar is no longer just a serious mood disorder. Its now used to describe even normal mood fluctuations as an excuse for their behaviour.