hey girls

question here ok have alot of you went by this app for when your fertile and it's really true the days it says and also my fertile window started yesterday and today is going to be the only day me and my husband make love which was earlier due to he's leaving today to go out of town it says I only have a 10.7 percent chance of getting pregnant has any of you girl had sex like only the 2st or second day of you being fertile and still got pregnant or you had to have sex when you were 32 percent chance I'm really wanting another baby and so it's hard to even think about it bc I feel there no chance if u only have sex 1 day and it's not the highest chance let me know thanks