Am I pregnant?

Okay here’s a whole timeline:

- I got taken off of my birth control on July 31 (I had just finished the last week so I had just gotten off my period)

- on August 2 at like 11pm I had sex with my boyfriend and the condom broke, took a Plan B at 2am on August 3

-Didn’t get any spotting, nausea, etc for the next couple days which is what the side effects of plan b usually are

- August 7 I got my period again (more cramps than usual since i’m off my BC)

That is at least 3 weeks early since my last period ended about a week before. Online it says that plan b can make ur period up to a week early, but not 3!!

I’m so scared that i’m pregnant and this is implantation bleeding (since plan B is not 100% effective)

someone please give me their insight!!!