Hi, I Get Regular Periods Every Month.... In Fact Every

Hi, I get regular periods every month.... In fact every month I get 3 to 4 dys before itself... My last menstruation date was 30 July... This month till now I did not get periods.... I was tensed if I would get pregnant... I don't want to so I took mensovit plus tab yesterday twice and today morning.... Pls help me when I'll get periods... I am a mother for 2 kids.... Pls advice me...