Help .. recently having irregular periods

Hey ladies so I’ve always have my periods on time but just last month my period was 12 days late... (my fiancé and I practice safe sex) and this mo I’m 5 days late like I been having occasional boob pain and cramps come and go should I be concerned?? Pregnancy is not one of them for sure but is this normal or?? I’m scared of the worst...thank u my average cycle 33 and last time was like 45

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