Kenalog and endocrine system

I had a shot of kenalog in my knee for a problem I have when I run long distances. I was told that it would have a 50% chance of helping but it could prevent surgeries. He never mentioned side effects. After the injection- my period came a week late and lasted three days longer than normal. Four days after it ended I got another period. This one was accompanied by severe headaches(I never get headaches) This period lasted another nine days. I went for my follow up and questioned the doctor about it and he said he must have forgotten to mention it but that it can cause some hormone irregularities but that it should go away within a month. I have been so exhuasted and barely able to function. It was five days since my last period and now I got another one today! I am furiouse because I was trying to get pregnant! Now I am freaking out because I am seeing on this sight how long this can really last!

After all of us have had these same problems you think we would be able to sue the company. What can we do becuase I'm on board if you all want to have a class action law suit. How do we start it?