stupid question

Ai

there are 8 days until my period is expected to start (though I usually start 2 days early so let's say 6-8 days). I have been feeling soooo nauseated all afternoon. this wouldn't be an early pregnancy thing would it? I'm pretty sure nausea happens after the missed period, not 6 dpo. but I'm curious, any chance? did any of you have nausea before you knew you were pregnant?