I had unprotected sex last May 9 and I took Nordette (as ECP) on May 10. Took pregnancy test (urine) last May 17 (got negative). Then Last May 19 there's a little reddish brown discharge on my pantyliner. My period is due on May 21. My average cycle is 30 days. My last period was April 21-27. I took another pregnancy test this morning (May 20) and it turned out negative though I still have the brownish discharge. Still want to be sure if I'm not pregnant. Please enlighten me. Thanks

If you last period ended on April 27, then you are not due yet for the next one yet. Its too soon to take a pregnancy test or even know if you are pregnant.

You need to wait until mid June. If you still haven't gotten your period then take a test.