Okay, so after my accident I didn't get my period for four months. My doctor said that my body wasn't letting me have my period as a result of trauma and it's completely normal and should come back normal and I should be fine as I heal more. I got my period again in May of this year. Now I've had my period for a month and a half and my doctor can't figure out why? I'm on birth control which is supposed to regulate it. Any ideas? Because this is frustrating and I'm all sorts of moody and miserable.