He came in me but I'm not on bc...

I had unprotected sex with this guy during my fertile period according to glow, and he came in me... the thing is we didn't discuss birth control beforehand which is something I always do beforehand normally but didn't this time, which is stupid I know... and he didn't ask until he came in me twice... now I'm nervous and feel like I seem crazy but I just was really irresponsible... I'm not sure if it's my fault alone or if it's his as well ? not sure how to feel