Plan B (Failure?)

Ok so based on this app my ovulation window is January 2-8 & I ovulate on the 7th. I had unprotected sex with my boyfriend January 5 & 6. He said he didn’t finish in me but I’m not to sure if he did or not because we were intoxicated. I took Ella January 7th (the day I ovulate) will the pill still be effective?