Am I just stressing?

Ok so my period is 4 days late. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> is usually very accurate about my start date, so idk why I haven't started. Me & my boyfriend do have sex, but he ALWAYS wears a condom & always pulls out with the condom. Should I be worried even tho I haven't started my period & he uses a condom?

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