What do you do with the anger?

I felt a flare coming on yesterday, had some crazy high HR, so spent the whole day resting, hydrating, doing all the things, spent most of today doing the same. Felt a bit better, decided to slowly test the waters and get out of bed. Did everything right, sat slowly, monitored vitals and stayed sitting for several minutes before attempting standing or walking. Get to the bathroom and heart rate spike and blood pressure drop that led to presyncope episode on the bathroom floor. And honestly I'm furious. I'm so mad. Is it seriously too much to ask for my body to work right?? Why is it like this when I do everything right??

What do you do with the anger? How do you get it out, or handle it in a good way? Does anyone have any outlets or things they do to deal with the frustration and the anger of chronic illness?