I take birth control, missed 2 days, brown discharge started yesterday. foul smell for 4 days, partner clear of std in jan. 2017 together 5 mon. bv??

Missed oral bc pill: Missing an "active" bcp (not a placebo) will start withdrawal bleeding from the lowered estrogen level effect on the lining of the uterus. The "foul odor" may be an infection (or a "lost tampon" still in the upper vagina). See your gyn for an exam and a culture. Negative for STD in 01/2017 is not a guarantee of negativity at present.