Health issue

I recently developed a rash that is extremely itchy. I have seen my doctor and am getting treatment but I am told it can last a few months. In the meantime I am miserable and it is consuming me. Here is my model:

C: Itchy rash
T: I am miserable
F: Helpless
A: Ruminate, worry, hyper-focus on it, get distracted from my life
R: I make myself more miserable

I feel like I am really resisting this situation and the resistance is creating more suffering. But I don’t know how to change it.