Pregnancy odds...

On November 10, I gave birth to our son then went and got my tubes tied. On December 5, my husband and I had sex despite saying we were going to wait until my postpartum checkup. What do you all think the odds of pregnancy are? High? Low? I know my tubes are tied, but like is there a certain amount of time we should have waited for it “take effect” so to speak or what? Anyone have any similar situations?