Pregnancy!

I'm always getting anxitey over being pregnant, even when my s/o and i were using condoms and birthcontrol. More recently, we had sex without a condom (stupid considering neither of us want a child) and i have stopped my daily bc. About a few weeks after this i had my regular period that was heavier and longer than my usual periods. Even after this period im still worried and this had happened multiple times in the past and if i keep worrying im going to buy a pregnancy test for the billionth time. Does anyone else feel this way? Any suggestions to ease my anxitey?