<<<<"How long between highs and lows? They seem back to back to me.
When having a high or a low, is there any normalcy in between episodes?
In either case, are the episodes really, really bad, respectively?
Do the events around you help to predict either episode; family issues, etc.?">>>>

I find highs, lows even what is normal between episodes for me varies by the day, seasons, holidays, stress load, wellness, etc. I've learned to 'watch out' for depression around holidays including birthdays and Mother's day. Some lows are worse then others but I find when I keep a mood chart, I can see some patterns such as the ones I just stated and I can keep an eye out for it. I highly recommend you keep one. There's one on this site under Quizzes.