The toxic shock syndrome thing was big back in the 1970's and 80's because they came out with super absorbent tampons. I used them and had a problem once with one that scared me so I quit using that kind and just went back to my regular Playtex. I never had a problem with them. Birth control pills helped my flow and I think the nausea thing might be adjustable with strength of the pill/amount of estrogen? I'd go to a gyn just to ask a bunch of questions and see what you can learn.

http://www.mayoclinic.com/health/menorrhagia/DS00394