effectiveness

how effective is pill + pull out? i take my pill on time. i may be 30 min-1 hour after the time i'm supposed to sometimes. i'm paranoid. my period ended june 25. had sex (no condom) june 25, 26, and 27. he came in me on the 27th. then we had sex july 4, july 5 and i supposedly ovulated july 6 or 7th.... ik u don't ovulate on the pill, but again, i'm paranoid and i started having stomach issues a week later