Period expected June 20th cramping but no period

So this may sound really dumb but my period is expected June 20th and my periods are very regular on time. It’s weird I have been cramping like period cramps thinking my period started earlier and nothing. I had sex with my husband with a condom we have twins but he thought the Condom broke but then said it didn’t. I am so scared to get pregnant. I never cramp days before my period on the day I get it but never like 5 days before.