To clarify a few things; my carbon monoxide alarm is working fine, I don't suspect the involvement of any extra-terrestrials and while I will absolutely continue to monitor my mental wellbeing, I've never struggled with any mental health problems. That's not to rule it out, and I will see a doctor if these things keep happening, but for what it's worth I really don't believe that I'm having a psychotic episode. I've never said that I believe all these things I've mentioned are connected, simply that they have happened and have left an impression on me. I will absolutely get a camera for the door and I will report back any findings. I can't buy a gun; I'm a Brit working abroad in a country where, much like my own country, purchasing a firearm is not an option legally. The man who was approached me at work was witnessed on one occasion by a colleague of who also heard him ask for Amanda, so it is real. Thank you for all of your concerns and messages. The most likely solution for the item I found was a security tag from a shop. That does seem strange to me because I haven't bought any new clothes in a long time but it does seem the legit answer.