Percent of pregnancy getting higher?

Cortney • With the most amazing man for almost 8 years, married for almost 3 years :) Found out New Years Eve we are pregnant :) what a great way to start off 2020!!
Every time I log a day even if I log that I took my birthcontrol pill that day my percent of chance of pregnancy keeps going up why? Im up to 7.6% but I take my Pill on time every day religiously and there isnt an option on this app for no male ejaculation inside which he never does were always carefull about that. I just want an actual accurate percentage, which I dont think this app can give me? Maybe someone can explain?