Should I take a Plan B or should I be safe? Condom broke but period is due

I'll keep it short, any advice will help please:

-I just had sex with my husband and the condom broke!! Omg...

-My period is supposed to start in 2 days

-My breasts are usually tender a few days before my period but I haven't had any tenderness at all yet...this worries me, maybe my period is late?

-We are not trying to conceive

-Condoms are our only birth control method

Should I take a Plan B or should I be safe? I'm skeptical about Plan B because I've had a bad history with my hormones going out of whack. My hormones just recently started balancing out.