SPOILER: IF YOU FIND INTRUSIVE THOUGHTS 'CONTAGIOUS' YOU MIGHT NOT WANT TO READ FURTHER.
Irulan wrote:
Yes, I have issues with intrusive thinking too (though I don't make any noises unlike the OP) and this issue was very difficult to deal with to me some time ago. But now I have managed to overcome this. I have something like an eye phobia and quite often I'm disturbed by the thought that something bad could happen to my eyes. My "favorite" vision concerning this is the one in which I am falling on sharp shreds of glass lying on the floor and get blinded when they cut my eyes

That's really similar to the ones I had as a teen. I'd 'imagine' needles piercing my eyes, or razor blades. And other awful things to other body parts. Mercifully, that all faded 95% away as I got older. But at the time it was horrendous (like many times a minute all day long).
It's my understanding that "intrusive thoughts" are an OCD thing. Or at least OCD-ish, in that you might have that part of it, but not enough or not enough of other things to qualify for a full-blown OCD dx (like with minor, intermittant tics and Tourette's).