Hi I’m 14 and have never had my first period yet. A couple months ago i I noticed brown stuff in my underwear and I freaked out. I thought it was poo but quickly realized it wasn’t! It has been going on every month a couple of times every month and has like black clumps in it. I have no idea what it is and I’m too nervous to tell my mom what it is. Can someone please explain to me what’s going on?