please help

Ive been on the pill for months, last month, i forgot the pill one day, then took it for 6 then it was my 1 week break for period. I started again on saturday so today was my 5th day and today he pulled out just to be sure but we're unsure as to if a little bit of cum came out before he pulled out, just wanted to know how high my chances of pregnancy are, as we are 100% not ready for a baby