i had it for a brief time due to a thyroid problem. i didn't menstruate for 4 months.
as for feelings, i dislike feeling/knowing that something isn't working right. that is, i highly value my health and this was an indication that i wasn't healthy.
at the time, i was frustrated because the dr's diagnosis wasn't validated by any diagnostic test AND he wanted me on a medication that only treated symptoms and would make me life-long dependent. i didn't want that at all. so i went off the medication, and that's when the ammenorrhea began (about 2 months after stopping meds).
during this time, i just felt called to do certain things. i went veg, then vegan; and my movement situation changed. i'd also moved to a new environment, which might have had impact.
my period came back, then i began to loose weight, and then i began to notice the connection between the thyroid (which docs had always said was "normal") and the symptoms that i had (weight gain, development of breastmilk, loss of menses). so, i started focusing on healing the thyroid through nutrition and movement (yoga specifically), and after a number of years, i was able to get normal, strong, healthy cycles.
so much so that now i'm pregnant (and i want to be!).