Sex and pregnancy scare

I'm 10 days late on my period which is normal for me because my period is so irregular but I had sex with my boyfriend two nights ago and when he put the condom on and then put it in it popped and he immediately pulled out..... The time he put it in and the condom broke was the third attempt with the same condom so idk if anything was in it yet because he didn't finish but idk if maybe pre cum was in there so idk if I should bother taking plan b or to just see if I get my period soon..... please help!!!!