What erp would I do for breathing ocd?

Does anyone know how to get rid of these thoughts? I have to manually breathe almost every second of everyday and it's getting tiresome and I can't stop thinking about no matter what the distractions are.

If your mind purposely keeps fetching a repetitive word, and you’re afraid it will never go away, is the ERP therapy to STOP the mind from doing it? Or ALLOW the mind to do it, and not react? Also, is repeating a word in your head a mental compulsion? Or would that be the obsession? So then what’s the compulsion? Posting on here? Lol

Been struggling with existential OCD lately. Very hard to describe the thoughts/feelings, but it is a constant feeling of being stuck in my head. Like what is consciousness and where do I think from? Like I think it’s OCD, maybe it is maybe it isn’t. But if it is, what would be good ERP exercises? Just existing (lol)? And what would be my response prevention? I’m not even sure what mental compulsions I may be doing.