How to deal with death ocd

Hi! I'm 21 and have dealt with ocd themes surrounding death since i was 8 years old. I am in a big flare up right now and i need advice. I have bad health ocd which goes along with this but i got a thought about a car accident and now my ocd is telling me since i thought of it, it will come true. I was then reading a book, and one of the characters died in a car accident right after their thought. I don't know what to do as i feel like ocd is preventing me from living my life and leaving my house. I get so many intrusive thoughts about death and how I will die young and my brain tells me it's a premonition. I'm in therapy but i'm still struggling.