About three days ago I cut my knee while getting onto my couch, I cut in on the end of my cell phone charger. It wasn't a deep wound, but enough to cause bleeding. I didn't clean it right away, but I did the next morning. For the past day the wound is really red, tender and warm to the touch. Today I went into a chlorinated swimming pool. While in the pool a decent amount of yellow fluid was oozing out of my cut. Like I stated, the cut is not deep. I was assuming that the chlorine was probably cleaning out the infection, however now about 12 hours later the wound is still very red, tender and warm. Should I be concerned?