period end early

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hi, i’m not completely aware of how periods work. but i was wondering if anyone can help me. my period usually lasts at least 7-8 days. it’s the 4th day and i’m extremely light and it’s only 6 in the morning as i write this. i had sex last monday. my question is if the condom didn’t break and if i had my period, i should not be pregnant, right? thank you and have a good day💗