I've always used a pantyliner, but only recently, I've started to notice that there's yellow stuff on it and I need to change it more frequently. It's not sticky or anything -- just damp and sort of gooey looking. It's a pale yellow. I also noticed a weird, musty smell, though not necessarily fishy. It occasionally itches, but hasn't burned or itched to the point where I couldn't handle it. What could this be? I also have not had sex for a while, and I've only had one sex partner. Neither of us have STDs.