Trying to be together for fertile days!

Georgia
Me and my boyfriend live in different cities, until January when I'll be moving in with him. But for now we only see eachother on weekends and it's getting very frustrating as my fertile days always seem to be when he's not here!! He's staying here for 9 days, comes today and leaves next Sunday. I start ovulating on Monday!! 😩😩 I know sperm can stay in the woman's body for 2-5 days but I've not heard many stories of women getting pregnant this way ? 
Wish I could switch my fertile days to this week but no! AF is due tomorrow. Light spotting last night, none today but I know she's on her way 😷