it's just a what if

okay so i stopped taking my birth control for awhile cause my schedule was all over but i started taking it again about four days ago, sunday night i had sex with a guy (losing my virginity) and he used a condom and he didn't come either and i obviously was on my pill for three days so logically it's an obvious no way but i'm highly paranoid about it and it's making me nervous cause yesterday i felt nauseous and was really exhausted.. is there any way that i could be???