What should i think?

My last period started may 30th and ended june 4th. I havent had a period since then. I have been sexually active for a while but my bf has never came before while we had sex ... Due to numerous interruptions except two days before my last period on may 28th. Glow suggested that i would have gotten my period on july 5th. Im very concerned. I always use protection. But im still worried. Please someone tell me what i should do or how i should feel about this.