Took ella (ulipristal acetate) one a month ago very close to my period due but i haven't gotten my period yet. took a test and was negative pregnant? ella (ulipristal acetate) in less thn 24h

Happens sometimes: Irregular bleeding after taking a morning-after pill, like Plan B or Ella, (ulipristal acetate) is somewhat common. Some women get spotting or bleeding before the next period. Women may also have a heavier or lighter next period, or a period that is early or late. A pregnancy test can be done 3 weeks after taking a morning-after pill, to be sure the pill worked. A negative result means no pregnancy from 2-3 weeks ago.