That's definitely not contagious. My mom had it one year. She was v for days. She thought she had food poisoning. But after so many days she went to the ER and they discovered the stones. When they went to operate on her they realized her gallstones caused gangrene in her gallbladder so she had to have it removed and suffered a terrible infection. She was so bad they couldn't stitch her up and she had to heal open. Your co worker needs to be seen. Poor thing. I hope you get to calm down. If its gallstones she has you'll be fine.