Not satisfied with my mbbs exam reslt / answer sheet checking

I appeared in MBBS final year exam in my two left over papers in March . In the result declared I could not pass with shortage of 13 marks in one subject and 8 marks in another I had done well in the exams and was not expecting this bad result. I retrieved PDF of my answer sheets from the university and got it checked from a teacher who is also a Doctor ( MD) and takes online classes and as per that teacher I am comfortably passing and the marks as per her assessment are far higher than the passing marks required. In her opinion there can be difference of max 3-4 marks between two checkers but cannot be this wide margin & she has given me her analysis of marks in writing. Basis her report I have challenged my marks for re evaluation. I fear that though university will do re evaluation but may not act fair with me so as to protect their own teachers Kindly advise what remedy do I have legally if I am not satisfied with re evaluation Can I approach court with my online teachers assessment.