Took 8 gynera pills as emergency contraception after withdrawl sex now period will be delayed or on time as still 4 days to my cycle and getting period cramps and feeling like period but no period yet panicking?

Conception occurs within a day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. A blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first-morning urine and follow instructions for the test carefully.