and when my period was due on the 27th it did not come. I have been cramping badly like I was going start. On Feb 1 I started which look like dirty blood with still a lot of cramping now today some pink. I'm still cramping on both sides. I too called the hospital that give me the injection said they never heard it messed with menstrual cycle. I can feel my body trying to have a period. I'm due 5 more injection I think I will pass. Has anyone had cramas anyone had cramps on both sides like someone squeezeing your ovaries likea rag. It hurts my mom thinks I'm starting menopause but I'm only 43. se but I'm only 43.