I had a Kenalog injection in May. I was on vacation in Vegas and...

I had a Kenalog injection in May. I was on vacation in Vegas and had bad allergies and ear pain due to my allergies. I went to an urgent care center and they injected the shot in my right butt cheek. I noticed an indention in that spot today and never would have linked it to the injection. I did online searches and put it together. I called the urgent care center and spoke with a nurse who told me that muscle atrophy at the injection site is a side affect and yes it can take several months to show up. In my case exactly 5 months to the day. The doctor called me back. I asked why he did not tell me about the side effects. His response was that only 1% of people get this kind of side effect. I highly doubt that this is accurate considering I can google it and find many people with the same reaction. I asked if it will go away and he said it may never go away. I am 27 and in shape. I am interested in pursuing this legally if it does not go away. It is pretty upsetting.