Chance of pregnancy/when to test HELP

Hi guys. I’m 20 and my last period was on the 7th Sept and only lasts 3 days, and I have a short cycle (25 days) and according to the app I ovulate quickly after my periods ends. I had unprotected sex on the 12th (11 days ago)and sex on the 19th/20th and my tummy feels a bit funny and my boobs are starting to feel tender and my period is 10 days away.. when is the earliest time to test?? I don’t know if all these symptoms are real or in my head. Do those early pregnancy tests before your late periods work?! If someone could give me some advice I’d appreciate it.