I posted recently and I've still not shook my current mind state. Basically two weeks ago I had a random 1 second horrible intrusive thought. It caused me great distress and guilt. Since then the following 2 weeks has been nothing  but ruminating on it, feeling guilt, trying to unbox the thought and find meaning to it. Aside the first few minutes after waking up I'm completely locked inside my own head until I go back to sleep. It's horrible I just want to go back to before that stupid fleeting thought and I just can't. It's like a tick that rears its head every other minute and washes me with dread and guilt all over again. 
Any further advice or success stories would be amazing thanks. 😔