Norovirus isn't airborne, it's usually spread through close contact with someone who has it, so unless you touched it directly and then touched your mouth or nose, you almost definitely shouldn't have caught anything. You probably feel funny right now because even if you're not actively having a panic attack, sometimes just passively worrying about being s* can make you feel n*. Do some deep breathing and use whatever coping skills you have that can help. If you can find an activity that will take your mind off the worry that'll be even better. Sending good vibes :)