Risk of catching noro?

Happy new year!!

I went to a NYE party last night with people I had never met before and ate the food that they had brought and prepared (kinda proud) but now I’m stressing. Two of the people said they had noro a few weeks ago (mid December) and I’m stressing.

I have been feeling okay, but some on and off n*, probably due to the anxiety. What is the possibility of me catching it? Ate a tiny piece of the cake they brought. I have no idea if anyone else has had it.