Will my future husband get to know i had sex before and i am not virgin? how can i protect or defend myself for this?

Marry the right man: That depends partly on his own sexual experience. A man who is not himself a virgin is more likely to be able to tell the difference. There are surgeons who can re-create an artificial hymen, so that women will appear to be virgins on their wedding night. But far better would be to marry a man who loves you, who you an be honest with, and who your are not afraid of.