Brown discharger? On birth control (Tri-Sprintec). What's up?

The brown discharge is no big deal. It is just old blood and maybe a bit of the uterine lining that didnt shed all the way during your last period. It may possibly be because you took a couple of Pills a little late, it is hard to say. At this point, condoms, for you, are for protection against STD's (and a little extra protection against pregnancy never hurts just in case) You have been on the Pill long enough that if something happens to the condom (or if you know your partner is STD free and you dont want to use a condom) you are not likely to get pregnant even if your partner ejaculates (comes) inside you. So long as you take a Pill each day you should be protected against pregnancy. Antibiotics can reduce the effectiveness of the Pill and some women will find spotting like you describe while they are on antibiotics.

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When you take an antibiotic you should use a back up method like a condom for the time you are on an antibiotic and for 7-14 days after you finish the antibiotic because it is possible to get pregnant while on antibiotics with birth control pills. BCP's work by supressing ovulation but they also make changes happen to cervical mucus and they thin the bloody, plushy uterine lining that women shed each month as their "period". This is why, often, women find their periods are lighter while on the Pill. There is less lining to shed so therefore the periods are lighter. Dont worry about this discharge unless you have pain during intercourse (sex) or if you have any unusual odor etc. If you have other symptoms (like pain during sex or an unusual vaginal odor) then consult your GYN Dr, otherwise it is nothing to worry over and will clear up. Relax though! The Pill is made so that you can relax and enjoy your sex life without the fear of becoming pregnant!.