Firstly, I would like to inform you that taking an I-pill
will not cause periods.
The periods will come at its own time, maybe slightly late too. Delay in periods after I-pill is a common and expected side effect.
Secondly, I would suggest you not to take more than one pill a month as one pill can cause serious hormonal changes.
Also, it is best to take it only in emergency. Casual and frequent use can cause long-term problems.