My friend needs advice what should I tell her

Diana

Would she be pregnant?

My friend had her period on April 19 it last 6days her cycle is regular she gets it every month her next cycle should be on the 17 of May she do not know when she ovulate she unprotected sex the 26 and 30 of April then unprotected sex on the 7 of May then unprotected sex on the 13 that day he finish inside of her the others were withdrawal can she be pregnant also what are the luteal phase by detecting and ovulation
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