Your normal depressions sound like me for years with a wake up in the spring, I'm certain it was cyclothymia in the past. Your other episodes sound familiar to me but they showed up at age 42 and got me a dx of bp1 at 43 yrs old. I couldn't find myself in the usual descriptions either at the time. A good book to look at is Bipolar Demystified by Lana Castle, she comes the closest.