Lately I've been feeling real tired, headaches , dizzyness, and always having to urinate I started my period on time but it only lasted 3 days but wasn't heavy and I'm still feeling pregnancy symptoms could I be pregnant?

Have you had sex? If so, take a pregnancy test. No one online can diagnose you

It is a possibility, it may have been implantation bleeding. You could always take a test, which should be repeated in a week, if negative.