Plan B Please help

Hello ladies,

Last week late Thursday early Friday (around 12:30am) my boyfriend and I had sex and he ended up ejaculating in me (first time). After using the restroom and cleaning up we went straight to Walmart and I took the Plan B pill in the parking lot . So I would say this happened in an hour frame . My period was supposed to start Tuesday . That wensday , Thursday and Friday I spotted and now it has completely stopped . I’ve been cramping everyday , not feeling well and I’m trying not to stress myself with my period not being here since I know that can slow down the process . I’ve had no leak, I even tried having sex to

Bring my period down and still nothing . Tomorrow it’ll be a week . Is this normal ? Please help