Late period

It's day 3 since I should have started my period. That I remember it's never been overdue this long. My boyfriend pulls out and tries his hardest but maybe it's not always the best. He's never came inside me and I've been feeling pain like my period is going to arrive soon but patience is my worst enemy right now. I've been feeling nauseous for the past few days too. Help me please. I need advice or answers.