Bless you (hugs) I really do understand what you mean about torment.
I have mostly Pure O type OCD too (though I've some compulsions) so I completely understand what you are writing. When I get really bad I will start to have terrifying intrusive images both in the dark and when I close my eyes and I'll start to see goblin like creatures out of the side of my eye. It is extremely distressing and debilitating and wears me right down. I get less and less rational when in fact when I'm well I'm pragmatic and skeptical.
Could you start to read something nice and soothing like Anne of Green Gables or Pippi Longstocking, it sounds daft but when I'm so unwell I find these help to ground me, grounding yourself is very important. I go out into the fresh air every day and stand looking up at the sky (in bare feet if it's warm and dry outside) and just listen and breathe in the air. I can't meditate as (a) I cannot still my mind (b)my OCD rushes into fill all the gaps so I try to concentrate on my senses of touch, taste and hearing.