Plan B and it’s effectiveness

Okay. So the morning of Friday the 13, I had unprotected sex and I’m not currently on any birthcontrol.

My period ended November 8th, and my calendar said I should start ovulating today (14th).

I took a plan b about 5 hours after I had sex.

How high is the chance of pregnancy.

Also, do not give me “Don’t have unprotected sex if you don’t want a kid”

I didn’t necessarily want to take it, but I did it for my BF.

Thanks