Dealing with Anxiety at Work After a Co-Worker's Insensitive Comment

My anxiety is so high because of something that happened at work... There was a new building to open a week ago and now everyone has been moved around. I work directly with a new person now and she is unfamiliar with everything (seizures and where stuff is). She isn't new to the building, just the added responsibility. Last week she said "I know how to respond to seizures because my dog had epilepsy." Just talked to the general manager and he told me he is deeply offended that she said that. I didn't tell him, a coworker did. I forgot until he mentioned it to me. Then I remembered everything she said, where in the building I was. I think he's pretty upset with her. How do I cope? I know it isn't my fault but I don't want her to be mad at me.