So my period is almost always irregular. Sometimes I even skip a period. When I get it though it is hardcore blood and pain, almost to the point where it's unbearable. I was supposed to start 4 days ago, but I didn't, which isn't a surprise. What worries me, is that I am slightly spotting, and it's like a pink red with brown discharge. Is this a normal thing? Or should I talk to my doctor? I've also had sex without protection recently, if that matters at all.