Non Resident Alien / Tax Amendment

Hi there, I am non resident alien under F-1 Visa. This is my 4th year in the USA. I filed my 2013 taxes using Form 1040NR-EZ, taxes 2014 and 2015 using Form 1040, and this year I'm filing via Form 1040NR-EZ. I realized that for 2014 and 2015 I made a mistake. What should I do? Do I amend tax return for 2014 and 2015? I'm worried this mistake might interfere with my future status or employment.

Thanks in advance.