The Depo takes care of your uterine bleeding
. The brown colour means that the bleed which caused was minimal and probably a bit old. But if it is continuing for 2 weeks now, then one has to be sure that it is not comming from another source like the cervix
or below. Polyps and fibroids need to be ruled out. Bactrim
may not be the cause, depending on the type of infection you had. Please see a gynaecologist to straighten things out.