ok so i am on birth control and my partner and i always have protected sex but last night we were so curious to what it would feel like without a condom. earlier that night i gave him a blowjob so there was residue of cum on him but he did clean it up with his shirt. when we had sex we did it without a condom for about 10 seconds. and he did not cum inside of me. is there a chance i could be pregnant? i am just very paranoid.