AITA for cancelling on my mother because of my disability?

20F Here, was supposed to go to concert tonight with my mother 60F. Unfortunately a couple months ago I was medically diagnosed with a terminal disease that causes me to be very nauseous (throwing up regularly), extreme vertigo, and causing limited mobility. She booked these tickets one month ago, and even when she told me about it, I mentioned to her that there is a high chance I may not be able to go. My disability is unpredictable and a vertigo episode can start at any moment. Well today I woke up and immediately the vertigo n nausea started. I informed my mother that I would not be able to come she blew up at me. Calling me ungrateful and inconsiderate. I tried to explain to her that I cannot control when I feel unwell and it would be similar to telling her to calm down from an asthma attack. She got even more upset with me and told me that I needed to be more positive and that I was ruining her night. I wanted to go, but I literally can’t. I can’t be sitting there around people throwing up and groaning in pain. That will not be enjoyable for me or any person around me. At the same time I still feel bad. I do feel like a horrible ungrateful daughter. Should I have gone? She didn’t even ask me before she paid for the tickets.