paranóia

paranoia noun [ U ] uk/ˌpærəˈnɔɪə/ us paranoia noun [U]
(MENTAL ILLNESS)

a mental illness that makes people wrongly think that other people are trying to harm them

паранойя
paranoid adjective uk/ˈpærənɔɪd/ us
having paranoia

параноидный
Stop being so paranoid - no one's talking about you.