It seems to me that they are watching me, there are hidden cameras at home and everyone has a conspiracy against me. Is it a disease or is it really so?

This is self-hypnosis. Perhaps this is due to some kind of psychological abnormalities, panic attacks. Or, this is a common way to attract attention. You know how children get what they want, for example, when they do not have enough affection from their parents, they invent fears for themselves, fictional friends, some image, a mask. No one intentionally wants to hurt you, you must remember and assimilate. Visit more open exhibitions, get distracted, walk.

Find yourself a hobby to your liking, doing business drives away these bad thoughts out of my head.

It sounds like a persecution mania by description, but I'm not a psychotherapist. wikipedia.org

I advise you not to wait for an answer here, but simply find a psychotherapist and consult with him.

You may also have a special attitude to sockets, people innocently talk about their own, and you think that they are whispering about you, laughing at you. Author, consult a psychiatrist. Do not hesitate, now it is the 21st century!