helpppppp

So August 20th me and my boyfriend had unprotected sex and he came on the bed then stuck it back in me. And I ended my period August 6th. And I took plan b August 22nd (today) at 3:00 and I'm curious if my body already released an egg and I waited too long for the pill to work. After we had sex I went to sleep and didn't get up to go pee or anything.