TTC #2

Hi I think I'm roughly 9DPO AF due on 9/10th. I have had really sore boobs and random cramping. (I never notice sore/tingly boobs on a usual cycle. Ever). We haven't been trying for too long but it's taken us longer than it did with our DD. don't want to test too early in case I get BFN, it'll just upset me and I'll not trust the test, but I'm very impatient and don't want to wait! When would you test if you were me?