I had a Kenalog injection for severe hayfever a month ago during ...

I had a Kenalog injection for severe hayfever a month ago during my period. The hayfever was cured immediately. However I wasn't told of any side effects. My period lasted for 2 weeds which was most unusual and another started a few days later. It didn't even look like a period as the bleeding was black. I was extremely worried as i had severe stomach and back pain. My doctor mentioned that it could be a miscarriage until I reminded him of the injection which he then told me of the side effects. I was still charged for the doctor's visit!