Pregnancy

So my boyfriend and I had unprotected sex 3 days ago and he finished inside me (on purpose) I'm really gassy today and have an uneasy stomach my period is also 5 days away will I miss this period or will I have to wait for my next period to find out? Also am I able to feel symptoms this early? I think I'm just getting inside my own head... I don't want to get excited and then not be pregnant... thanks in advance for any answers.. please no judgement