Just wondering if anyone would know this? i am ttc and i had unprotected sex the whole week i was…

Just wondering if anyone would know this? i am ttc and i had unprotected sex the whole week i was ovulating and on my ovulation day and i took an ovulation test that said i was ovulating and had unprotected sex that day also. My period ended up being three days late and i took a preg test and it said neg. the next day i had a period but it only lasted for one day, so could i still be pregnant?