I started getting random stomach pain on my right side a little below my belly button last night after dinner. I'm 19 and pretty healthy. The pain didn't last long and is random. This morning I woke up and got my period. When I had my BM in the afternoon, I was shocked to see a little tiny tiny (only visible if you look really closely) streak of red on the surface of the tip of the stool. Everything else was pretty much chocolate brown. Being the hypochondriac that I am, I can't get it off my mind. Any idea what this is?