Whilei it doesn't sound like your doctor did anything wrong, you can speak to a medical malpractice attorney and see if he/she did anything out of the ordinary or differently than any other similar doctor would have done in a similar circumstance. If not, then you don't have a case. If he departed from the normal community standard of care, then you do have a case.
If the lawyer will take the case on, then you likely have a legitimate case. Otherwise, he/she won't take the case in the first place.
Good luck. with your foot.
You need to prove 2 things to have a valid Medical Malpractice case. First an injury and second that the doctor violated the Standard of Care which means that the doctor treated you in an improper manner which caused the injury. To evaluated whether you have a case an experienced attorney needs to review your medical records and have them reviewed by a doctor to see if the Standard of Care was violated.