... It seemed like I wasn't going to have my period since two months passed and no period... yay! I'm due in a week for my shot and guess what?! I started my fricken period!? I'm bloated, with backache, and tummy pain); has this happened to anyone? THe on and off periods/: anyone know why his happens? I won't see my obgyn till like 1 1/2 week mark/: