Some thought like a phrase or a word or a dialogue comes in my mind suddenly and interrupts my actual thinking then suddenly disappears in 2-5 seconds but I immediately forgets that thought completely. Appears at least one to few  times a day for one year. When it appears I tried to immediately write that down or say it loud but can't and immediately disappears and I forget leaving me confused. At that episode if I read or hear someone saying I can read and hear but can't understand what they say or read, as this interrupts my concentration. Even while speaking if that confusion appears I stop for a while and sometimes I misunderstand what someone say as this Intrusive thought overlaps with what they say or what I hear from TV or phone...