Most women ovulate about 12-16 days before their period so I would say that there is a probable chance of becoming pregnant. Good luck!
yes. women don't always ovulate like clockwork.
I think it is possible but you need to wait until at least october 1st to test assuming you ovulated on the night you had sex. Maybe 5 days later (oct 6th) if you ovulated up to 5 days after the night.
You can try HPT and see! Good Luck