The first thing I would suggest would be to stop using tampons and get some organic menstrual pads (or tampons, but I've gone off the whole tampon idea). Natracare is one brand I know of. If they don't have them in your usual grocery store then check a health food store. Alternatively, you can try a menstrual cup, such as the MoonCuo (UK) or DivaCup (US). Tampons contain all kinds of nasty things and even if you've never had a bad reaction before you could develop one now. Plus, if you have some sort of bacterial infection then you want to allow your vagina to breath and heal itself, so shoving cotton up there is not a good thing to continue.