My period starts/stops, is heavy/light, lasts 3 days/ lasts 10 days, shows up twice in one month...whatever wild thing it can do! I'm working with my doctor (and bio-identical hormones) to bring everything back into balance. Until then, my cups have been a real blessing.
Just this month, if I didn't have cups, I would have spent a small fortune on tampons. Not to mention the discomfort I would have felt after inserting a super plus tampon..thinking it was going to be a heavy day...and have it totally stop!
My period can be as wacky as it wants to be right now. No worries with my Lunette or Mooncup.