Was supposed to get my period on the 4th but got it on the 7th and my first fertile day was the 8th. i had unprotected sex on the 4th could i be pregnant?

If I understand: ...your timeline correctly, then having a normal period after unprotected sex is a reliable indicator that you aren't pregnant. It's also unlikely that you were fertile on the second day of your period. Occasional late periods are common. Rarely, they're late because conception occurred but the pregnancy didn't "take". Regardless, it's extremely unlikely that you're pregnant.