What were your injuries? Med Mal cases are VERY expensive to pursue and you need the opinion of an MD to back up any claims of malpractice you may have.
What are your injuries? Did you suffer any lasting side effects? Medical malpractice lawsuits are expensive to pursue, and if you did not experience a significant injury, it's probably not worth filing a claim. The legal costs (for things like medical experts) would be more than what you could recover in damages.
However, if you feel that your injuries warrant a lawsuit, contact a medical malpractice attorney to evaluate your case. You would have to prove that the doctor was negligent (that they fell below the standard of care), and that their negligence caused your injury.