This is for those like me who have extreme intrusive thoughts, and have no idea what it is, or are just greatly distressed by them. I have them, too! I have had them my entire life, now nearing 30, and I have just finally found my answer. I knew OCD was involved, but I discovered Purely Obsessional OCD today, and wanted to share with you what is on Wiki:

The nature and type of Purely Obsessional OCD varies greatly, but the central theme for all sufferers is the emergence of a disturbing intrusive thought or question, an unwanted/inappropriate mental image, or a frightening impulse that causes the person extreme anxiety because it is antithetical to closely held religious beliefs, morals, or societal mores. The fears associated with purely obsessional OCD tend to be far more personal and terrifying for the sufferer than what the fears of someone with traditional OCD may be. Pure O fears usually focus on self-devastating scenarios that the sufferer feels would ruin their life or the lives of those around them. An example of this difference could be that someone with traditional OCD is overly concerned or worried about security or cleanliness. While this is still distressing, it is not to the same level as someone with purely obsessional OCD who may be terrified that they have undergone a radical change in their sexuality (i.e.: might be or might have changed into a pedophile or become homosexual), that they might be a murderer or that they might cause any form of harm to a loved one or an innocent person, or that they will go insane. They will understand that these fears are unlikely or even impossible but the anxiety felt will make the obsession seem real and meaningful. While those without Purely Obsessional OCD might instinctively respond to bizarre intrusive thoughts or impulses as insignificant and part of a normal variance in the human mind, someone with Purely Obsessional OCD will respond with profound alarm followed by an intense attempt to neutralize the thought or avoid having the thought again. The person begins to ask themselves constantly "Am I really capable of something like that?" or "Could that really happen?" or "Is that really me?" (even though they usually realize that their fear is irrational, which causes them further distress) and puts tremendous effort into escaping or resolving the unwanted thought. They then end up in a vicious cycle of mentally searching for reassurance and trying to get a definitive answer.

When I first read that, in brought tears to my eyes and gave me a sense of security.

Be safe, y'all.