Im worried that im pregnant but the test i took says im not?

i had my period two weeks ago, then a few days after that my bfs condom broke. i took the mornin after pill but lately i get neasuea at night, im getting irritable, odd food cravings and then bleed a bit but only for a few days and it was light pink bleeding. is that normal for morning after pill cuz ive never done morning after pill before nor felt any of these symptoms before.