I have generalised anxiety disorder. It’s a condition that falls under “anxiety disorders”, which also includes OCD, despite more often being categorised under “depression”. It sort of fits with both. It’s an obsessive condition that causes someone to be unable to control their fear, to become entangled in irrational and debilitating worry, and at its extreme, to be afflicted by horrible intrusive thoughts.
I’ve had AD since I was in my early 20s, undiagnosed until my late 20s. Those were some fairly horrendous times, not being able to understand why I couldn’t cope with basic situations, and utterly terrified that the awful thoughts I was having might be real. Too scared to tell anyone, and too fearful that if I did I’d be feared, I suffered badly. As it turned out, it was telling someone, anyone, that was the first step to getting a great deal better.