Do I have a possible case?

Three years ago I had surgery at a hospital. After surgery I experienced Serotonin Syndrome. I was out (almost coma type) for almost a day. After that I had issues with memory loss and concentration. Last year I had another surgery at the same hospital. I figured the first time was a possible mistake. After the second surgery I experienced the syndrome again. This last time was not as severe as three years ago. When I talked to the drs they did not seem to have any notes about the first instance. Does this sound like I may have a case?