Could I be pregnant?

So sorry if any of this is tmi but my boobs have been really sore for a week now which I thought was just cause of ovulation cause they usually get sore around then. But this time it's much worse and now the last two days I've been nauseated and weak. We are trying to conceive and had sex during my fertile window. I'm not expecting my period till the 12th of February....should I get excited?