Suggest Treatment For Irregular Menses Cycle

Hi.. i just read that ipill may delay periods. I have taken ipill many times. It was normal all other times whenever i used ipill .. But this time i used it twice in a week in march starting .. after that i got a small period . But i m not getting my cycles since then .. Please advice me what should i do ... i m scared if it cause infertility .. how can i cure it now ... plz plz plz help me