I am worried that whether am pregnant.i had intercourse during 14 th and taken pill at 71th hour and then had sex on 29th.my period due is 2nd aug ?

Testing is required: I'm going to assume from your question that you had unprotected sex followed by emergency contraception and did not get your menses as expected. I would suggest you do a home pregnancy test. If you are not comfortable with this, you can get a blood test with your gynecologist. Emergency contraceptives can interfere with a normal cycle which might delay bleeding.