Inferiority complex. Suggest a measure!

I suffer from inferiority complex this is a hindrance for me in many ways am not able to progress, to begin with i am not that bad at studies but my habit of postponding things has become a habit and am not able to comm out of it , am giving my bank exams but struggling to succeed because of this, to add to this people around me compare me to my twin sister... we went through t leg lenghthening at age of 3 ever since my legs have lost strength and i walk slow and my walking style is not normal i was not taking this seriously when i was young but now as i grow old am ashamed of this and even afraid please help me come out of my complex worst part is now that my sister had got a job its very difficult for me to face her and the people around but my parents struggle between both of us. we did not grow up to be affectionate twin right from child hood she puts me down and all those memories keep me from loving her please suggest a measure