Should I test again?

So i’m currently late for my period by four days. i was supposed to get it monday, tested tuesday and it was negative but my period is never this late. i’ve had unprotected sex and idk if i should test again or wait to see if i get my period? i’ve been stressed lately and i know sex can also affect period cycles but like i said the most i’ve ever been late is two days unless i was pregnant ( i have two daughters already) what should i do?