I have had a similar dilemma in the past. i chose the event over hospital and it did not go well. I just made a fool of myself in front of many people. Can you keep a mask on for that length of time? If not perhaps going to hospital is the least stressful thing you can do. Having a breakdown in front of a tonne of people is not going to help your situation. It is a tough call and only you know what you can handle right now. Take care.