I have always had problems with using birth control pills for contraception. My body has always reacted to the pill. I think that my doctor tried me on every pill that was available and every one caused me to have reverse periods......on for three weeks off for one. It was horrible. I finally gave up on the birth control pill and after I had my two daughters had a tubaligation. I'm not sure if Rh- has any baring on a tubaligation, but for me it caused adenomyosis, which is the same thing as indometriosis except it occures on the inside of the uterus rather than the outside. Ultimately, I had to have a hysterectomy due to this.
My suggestion.......let your man handle the contraception AND a vasectomy. The risks just aren't worth it.