fertility 🤔😕

okay so ive been using the eve app for less then a year. when I check my calendar my fertility window is always low in the first few days and gets higher near the last 3-4 days reaching about 32% as of recently. however when I check google it says the highest chance to get pregnant is during pre ovulation and first few days of actual ovulation. so at this point I'm confused. I suspect myself of being pregnant but im not sure whos info i should follow about my fertility window. any advice or answers? 🤔😕