I have no job bcoz fo my mistake.

when I was in graduation B.Tech. I have got some back due to my illness now I am pursuing m.tech.. whenever I go to a job I always feared that what will I say about my failures as they laugh I have not good academic background I want to forget my past and want to concentrate on my career.and want to do my work with responsibility.what can I do now to get rid of my past so that I can work with responbility in future.i have no job bcoz recruiters thinks that if they hire me what will they answer to the organization.....plz help me

You can never change your past, you can only learn from it.

Offer to work for a couple of weeks on a trial basis, maybe without pay to prove yourself.