One of the hardest things to cope with when struggling with OCD is accepting uncertainty and being comfortable in the not knowing. It’s hard, it’s a long battle, but accepting you’ll never have the exact answer to your question’s is a huge step in getting better!
OCD is chronic though, so it will never fully go away. But the thoughts will become quieter and with therapy you can learn how to deal with the thoughts
Sadly it will never go away, but you will learn to manage it. I’ve reached the point where when it starts I sit down, I journal my thoughts and remind myself the last time it happened it got better. My biggest problem now is waiting for the next thing to hit, so I focus on that. Have you ever tried an outpatient exposure therapy program? Helped me a lot.