PLAN B HELP, NEED HELP

My boyfriend and I had unprotected sex and finished in me by accident on the 3rd. So we bought a Plan B (My Way) and I took it like 5 hours after. My period was suppose to start the 8th and now it’s the 9th and still haven’t started. I know there may be a period delay but I’m still really concern.

So I just want advice about what I should do. Should I just wait a few more days before taking a test to see if my period come or take one now

Has anyone tried the plan b I did (My Way) and experience the same thing?

My boyfriend and I have mentioned that if I was happen to ever be pregnant, things will be fine but we would prefer not