You can gather all the evidences. secure them, have a second opinion from another expert doctor, secure it and then file a consumer court case for medical negligence agaisnt the doctor.
You should not file any original documents before court at the the time of filing the case,
You can produce them at the time of trial.
In Supreme Court of India
V. Kishan Rao vs Nikhil Super Speciality Hospital ... on 8 March, 2010
though the district consumer forum awarded the complainant the suitable compensation the state commission and the national commission had set aside the forum's judgment, however supreme court concluded that :
For the reasons discussed above, this Court holds that it is not bound by the general direction given in paragraph 106 in D'souza (supra). This Court further holds that in the facts and circumstances of the case expert evidence is not required and District Forum rightly did not ask the appellant to adduce expert evidence. Both State Commission and the National Commission fell into an error by opining to the contrary. This Court is constrained to set aside the orders passed by the State Commission and the National Commission and restores the order passed by the District Forum. The respondent no.1 is directed to pay the appellant the amount granted in his favour by the District Forum within ten weeks from date.
Thus, you can aproach consumer forum but be prepared with the expert's opinion too in this regard.