What Causes Excessive Vaginal Bleeding On Usage Of Boric Acid?

I ve been using boric acid for about 6 months now for bv and yeast infections. It always made me spot a little, but this last time it cause me to bleed excessively. It usually is only a little bit for a couple of days, but I ve been bleeding for 2 weeks now and it is VERY heavy. I thought it just caused my period to start early (2 weeks early), but my periods never last more than about 5 days. I am bleeding completely through tampons in about 2 hours and I am losing a lot of blood in the shower. I can feel it coming out in mass amounts. Usually it stops on its own, but I m starting to freak out. What should I do?