I had a kenalog injection early last month for asthma. I ended up having my period 2 weeks early, then another 2 weeks later I started again and am now on day 11 with no end in sight. I was warned that I may have an indentation, which I did not get, but was in no way informed of the possible effects on my menstrual cycle. I would not have agreed to the injection had I known of this possibility.