How long after taking pill am I protected?

Perla
I had sex last night and let's just say the gun went off before the runners even took their marks. I started the pill 2 weeks ago to the day and I take it at 11:30am EST every single day (+\- a couple of minutes) and I'm freaking out that it didn't work properly or something because I've never been ejaculated in and I don't know if I should take the plan B or trust that the pill is working. 
Halp!! 😖