I’m on birth control (I’m on the last row of my 2nd month) and my period for the first month was normal. But this time, I had brown discharge on and off for 6 days (not even close to enough to fill up a pad) and then I started bleeding for a day or two. And now, I have this brown discharge again. I had unprotected sex, my partner came in me about 5 or 6 times. But like I said, I’m on birth control so I’m pretty sure I’m not pregnant. What could it be? Any ideas?