Being a survivor of mental, physical and sexual abuse, I don't know that I've never had a period (even as a child) where there wasn't some degree of depression.
I search my memory banks and think it goes way back and I can't decipher a time of it beginning.
Now, in that search, I did see clear times in which I felt carefree and "light".
Thanks for the question because it brought me some good memories.
KD