I had unprotected intercourse last month in december and took an ipill,  while i began my periods, the duration was for more than 5 days whereas this never happens to me i generally start flowing lighter on about my 3rd day, but the flow was not very heavy but i was bleeding so i was advised a medicine pause 500 twice five days then the bleeding stopped now my date of bleeding the last month was 19 dec and it is already 21 now but i still have not got my period what should i do ?