helpppp

Ladies Im freaking out, i started my second pack of pills this past Sunday, & i had sex monday he didnt even cum inside he pulled out, but im freaking out because i waited a couple days to start my second pack , i didnt start it right away after i finished my first one bcuzz of work i couldnt pick up my refill roght away, & today i had some light spotting just when i wiped. Could i be pregnant or am i over reacting??? Someone plzz help i know its too soon for a pregnancy test. So im scared this might be implantation bleeding?