Late period

Last month I Had protected sex with my boyfriend 2 days after my period ended. The condom broke but we stopped straight away and he didn't cum either.
​About 5 days ago me and my boyfriend had sex again PROTECTED, it didn't rip and he didn't cum either.
​My period is now 3 days late and I'm starting to worry. 
​I've been getting cramps here and there along with discharge, should I be worried?
​I'm 17 also!!