I have had a colpo as well...the brown stuff is a combination of the iodine, old blood, and the salve they put inside your vagina. This salve helps stop bleeding, especially if they did a biopsy. They don't do stitches unless the biopsy is big enough to warrant stitches, so they use this salve that helps clot the blood. If what is coming out of you is brown, seedy-looking and clumpy, it is most likely the salve. You should not have sex unless your doctor says it is okay to. If you notice any heavy bleeding (more than a pad an hour-NO tampons), foul-smelling discharge, or have extreme pain, either go to the ER or schedule an appointment with your Gyn ASAP, as those symptoms could indicate an infection.