I've always had a normal 5 day period each month, but this month of May I had pink then it turned a light brown color spotting instead of an actual period and IM NOT PREGNANT. I haven't did anything to become pregnant.last month I bled twice April 1st and April 22nd. And me bleeding twice a month usually happens every six months, I guess that means my period switches up.My cycle typically ranges from 21 to 28 days. Please tell me what it could be, I'm 20 yrs old and I'm worried now. Is this my period or something else?