I just got off birth control about 2 months ago, I hear you can be way more fertile. I did have unprotected sex last night and he ended up finishing inside

I went and got a plan b this afternoon and took it.

My period is supposed to come today but no still signs of it.

Is it possible for one to become pregnant right before your period especially after coming off birth control 2 months ago?

I’m also over 200lbs so I know that can effect the effectiveness of the plan b.