I have had many problems with all hormonal forms of birth control, including the IUD. Basically, my problem with all these methods is that I either bleed non–stop for months, or I get a period every two weeks. Over the years of my marriage there have been numerous times when I wasn't able to go to the mikvah for months. And this while in contact with a Rav.

I refuse to get the non–hormonal IUD, as the insertion for me was very painful and I can't put myself through that again. In addition to the commonplace occurrence of heavier periods, which is already an issue for me.

A diaphragm worries me as the effectiveness of it is not good enough for me.

I really want to use Natural Family Planning, as it is the only method that is truly side-effect free. My husband understands it and is on board completely. Is that method permitted, if it requires abstaining from relations on mikveh night?