Well, first of all, I assume she washed your hair when you arrived. Hairdressers, honestly, are the people I NEVER worry about. Their hands are in soap and water ALL. DAY. LONG. so the risk is beyond slim of them passing on any gastro. sickness. Talking/exhaling can't give you Noro, it's 100% fecal oral, so in other words, you'd have had to eat her poop or v*, which in this scenario would have been impossible. There's really no way for you to have caught anything at all during your time with you. I know it's hard when your anxiety is trying to work you up, but it's all lies. You're completely safe.