What do you do when one of your biggest OCD fears comes true?

Hello,

I have struggled with health OCD especially around my family for over two years now. Throughout that time one of my biggest fears was sepsis, this caused compulsive actions in itself. Recently my dad got sepsis, and is still dealing with complications. I am absolutely beyond myself with anxiety. I always did everything in my power for it to happen to anyone but I never thought what I would do if it actually did. I’m sure you’re all familiar with that circling thought. What do I do, how can I help this. I am sick. Please, anything helps.