Am I paranoid? and how can i stop worrying? Thoughts: my sister wanted to kill me, some guy to poison me, bus driver to kidnap me, someone broke in my house, someone watching me through wcam

Heard of many people struggling with similar things, especially the feeling of being watched or followed. Trying to cover webcameras and such myself, however the better solution might be to eliminate (prove wrong) all negative feelings, "How high is the risk that someone actually would do this to me? Rather non-existent." Maybe cover them up with "Oh, what a coincidence" or "How funny it turned out that way", or any other fitting statement?