My periods are irregular for protection i consume i pill...my period was occure on 5th of aug after that they didnt came...what is reason behind it?

About i-Pill, Plan B: i-Pill, Plan B, or other morning-after pills, can alter the menstrual bleeding for the cycle in which the emergency contraceptive pill was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, because a morning-after pill works most of the time, but not all the time. Pills contain hormones that temporarily alter one's hormone balance.

Nutrition?: You need to understand your irregular periods to answer this question, irregular periods can be due to stress, poor nutrition, hormonal imbalances, tumors, polycystic ovary syndrome. Go to a maternal Gyne/Endocrinologist to sort out treatable causes for your symptoms