QueenAccountant, Do what feels right to you, but don't do it out of guilt. I have had to cancel hotel rooms at the last minute for work and it has never been issue. No cancellation fee etc. Even if there is a cancellation fee it would be worth swallowing it for your own mental health. Honor your feelings.

I am definitely bias because my parents are a HUGE trigger for me. I use to force myself to see my parents and in May I made the decision to stop communicating with them. Certainly I have a lot of baggage with them because of an abusive childhood, but it just got to the point that I would have anxiety for a week before I had plans to see them and after I saw them I would wake up in the middle of the night and instantly vomit from anxiety. Keep us posted.