Wait...WHAT?!?

Ok,so I volunteer at a horse stables. So I was volunteering that day and I was told to brush some horses,so I went to brush a horse. I was brushing and just thinking to myself when all of the sudden I feel like I’m going to throw up! I walk around the horse pen and took deep shaky breaths,I felt very sick. It went away for a few seconds then came back,sorta like a wave,in and out. Finally the sickness passed and I went back to brushing the horses. After about a hour later I had to use the bathroom,but the only have a single outhouse so I went into the out house,I wipe and look down at my undies and there is was.BLOOD. I looked at it and smiled,it was happening.