Will i end up pregnant?

so October Monday the 16th at about 2 in the morning i had unprotected sex using the pull out method. the same day at around 4:30 pm i took the plan b. is there a good chance that i could be pregnant? i tried to remember my last period but i am not good at keeping trach but on this app it said 8% high risk pregnancy but then when i. adjusted my last period it said 22% high risk pregnancy for the day of october monday. the 16th. please be aware that i was on lo loestrin fe a month ago but had to stop taking because it was causing me depression. please help.