I use Lugols and take between 6-9 drops a day. I used to drink ACV all the time (actually a few years ago I used to drink my Lugols in ACV but haven't done that in a loooong time).
I saw on the link they mentioned taking Magnesium for period cramping. Whilst I don't actually cramp with the bleeding, I have started taking Magnesium Chloride (both internally and transdermally). Hasn't made any huge difference as yet, but I am sleeping much more soundly.