pregnant while on period?

listen girlies. i just made a dumb mistake and had sex with my boyfriend without a condom, and i'm not on birth control. he did pull out far in advance, but i know that precum is still a thing!!! 
i'm on my period, day 2 (my periods usually last between 5-7 days and my cycle is about 22 days). I just wanna know if anyone else has done this before and what are the chances of be becoming pregnant?