(FEMALE; 19) For the past two weeks I have randomly seen a small amount of blood on my underwear, along with discharge coming from where, what seems like, my bladder (it smells, also). Although the color of my actual urine isn't different, it is brownish when I wipe. I took Plan B (the morning after pill) about 5 days before the symptoms started. I also have been working out (specifically running) for the first time in over a year recently before this started and eating differently trying to lose weight. The blood that I have noticed is inconsistent and comes and goes in small amounts (ONLY on my underwear). However, I've been feeling random (what feels like) period-like cramps that come and go for the past two days. I have a past of having a LOT of bladder infections (particularly in the past year, probably from being sexually active), but this does not feel like a bladder infection (no burning or pain urinating, etc). Does this sound like a risk for a very serious matter? I'm attempting to make an appointment with my doctor soon, but I want to know if I should be really worried. I realize it could be many different things, but I have yet to see anywhere online that points out blood SPECIFICALLY on the underwear, not in the actual color of the urine. Please help.