New to this stuff

Ashley • Wifey 💍 24/5/2014 From Australia 🇦🇺 Pregnant with my first 💗👶🏼💙 due 2/10/18

So I’m new to all this stuff. And I have a question..... how soon can you feel symptoms? I don’t want my mind and body to think I’m pregnant if I’m not. AF isn’t due till Christmas Day.