Plan B on fertile days


So this morning about 11:30 I had unprotected sex and my BFF believes he got some in me but still had to pull out to cum so about 1pm I got and took a plan b pill. However I’m on my second fertile day and not sure if I have already ovulated yet or not so not sure how high risk I am of getting pregnant. After I took it I felt really tired and dizzy but not really any cramping or anything so idk how effective the plan b will be if I already ovulated.