Hi, I'm 22 years old I had sex august 1 and 2 both days protected. The whole month of august I did not have a cycle just spotting. Now that spotting has turned brown and here we are in the month of September. I do not have any symptoms of my cycle I took a pregnancy test twice both were negative. By the I started talking biotin pills I'm not sure if that's why. Well the other day I shaved my vagina And a little under the butt. Right after I went working out I did a 5 mile walk. I'm not sure if I had on the wrong underwear (thong) and it irritated me down there but as I was walking I felt like it was too tight. I got home And I had buts down there ugh so very painful and itchy. What could this be? Its the color of my skin. I have no symptoms of feeling sick just headaches but I'm always getting a headache every since I was little please help!!!