Opinions pls I’m scared

So last time I had sex was the 20 and 21 of February the last two days of my period, I am currently waiting on my period that was supposed to come and is now 2 days late (my period is very irregular). We used protection and condom was not broken, but on Saturday we had sex and condom broke so I took plan b is it possible that my period is late because of the plan b. Also it smells very strange down there. Any opinions pls let me know I’m very worried even tho my boyfriend says we are fine and it’s just stress I need someone’s else’s opinion