My boyfriend and I had sex about a week ago without a condom and we are pretty sure that no cum got inside of me but we took a Plan B pill just to be safe. I took the pill within the hour that it happened and it was also my boyfriend's 3rd time cumming that day.

I was supposed to get my period sometime last week, but instead I have a white milky discharge and no period.

The last time I took Plan B, I took it 4 hours after it happened and I got some light bleeding 4 days later.

Did I take the Plan B too early and make it ineffective for me?

Also, is it too soon to tell whether or not I am pregnant?