chances of pregnancy?

So I'm freaking out cause my boyfriend and I were stupid. We had unprotected sex twice on a fertility day that eve said my chances of pregnancy were 22%. Neither of us had known this at the time. We had sex two hours apart and he peed in between so that most likely cleaned him out from last time so no chance of pregnancy from precome right? We both know for a fact he didn't come in me either times. I took plan b this morning. Anyone know what the chances are now if he didn't come in me and precome had little to know sperm in it and after taking plan b? Will the plan b Work if I'm ovulating/ovulated? Please help. I need reassurance