Odds of pregnancy?

Hi! So this is my first month off birth control because my prescription has been pushed back (no idea why) but I heard its unlikely to become pregnant the first month off the pill anyway so me and my fiance havent changed anything. My period started april 14th and ended april 19th. On cycle day 10 and 11 I got eggwhite cervical mucus which I never had on the pill and now im worried because me and my fiance had sex the day before I started getting the ewcm and he always finishes inside. Im currently on cycle day 21 and its been 11 days since I started getting the ewcm, I took a pregnancy test and it was negative. Is it possible that i still could be pregnant? If so what are my odds? Im guessing I'm 9 or 10 days past ovulation at this point (disclaimer- I know most of you arent health professionals I'm just looking for any number that you guys want to throw at me. I just feel so trapped in this period of not knowing)