Pregnancy scare

So I had unprotected sex last week during my fertile week and took plan be 2 1/2 days after but he didn’t bust in me we had sex like 5 -10 minutes after he did and I’m scared I could be pregnant and I don’t know what to do really because my period is 10 days away and I don’t want to wait that long and none of my friends are really helping or being supportive 😕any help or ideas?