I had a coritsone shot in my lower back during day three of my menstral cycle and I had been bleeding for 15 days ever since and after a week i'm bleeding for 5 days and still. The current bleeding is not heavy, but it's constant with alot of pain. The doctor who injected me says what happened to me it's verey rare but it could happened. My gyn says i need an altra sound to find out but i'm still in pain and bleeding!! anybody have an answer how or when this is gonna stop???