please read! I need help!

okay, so saturday morning I woke up for work and as usual, I went into the bathroom for my morning routine. I went pee, and half asleep I looked down and there was a dark but bight red decent amount of blood. My period isnt supossed to start until the 7th of august. later that day I came home and noticed that it had completely stopped. I thought I was in the clear! and just had like a freak accident or something. but sunday afternoon, I found a brownish/pink discharge. I read online about it, and I kinda freaked myself out. I have never had this happen before in my life. any suggestions as tp what it could be? please help!!!