Honestly you're MUCH more likely to get a bacterial infection from the natural bacteria on his hand than you are to get pregnant. Also stress can cause nausea, vomiting, dizziness, headaches, fatigue, appetite change, late period, bloating, etc. So can quite a few other things so it's very difficult to tell if you're pregnant based on symptoms alone.
3 weeks after this happened or if your period is late, take a home pregnancy test.