Hi, I Want To Prepone My Periods,I Never Used Tablet

Hi, i want to prepone my periods,I never used tablet before. Am scared tat wil taking pill leads to side effects in future? I want to atten imp function on 28 th oct. Am havng whole fruit pineapple night nd next night papaya. Nd am taking dates n more quantity evry evng frm last 3 days. Green tea once in a day. I can feel the heat in body and pimples due to heat but not geting periods.help me