Hello I M 27 Yrs Old Im Trying For A

hello i m 27 yrs old im trying for a baby on 17th April my dr. said both follicle ruptured told me for 3 day conti.. relation and called me after checking my periods today is 1 may i still dont have my periods and dr yesterday checks and said ther is nothing i dont understant what happen and she give me combipure for five day for next try but i still dont have my periods my expected day for periods is 26/04/2015 pls guide me