I've never been diagnosed with anything but I had an interesting / uncomfortable experience the other day, went to a cafe with family, we were sat close to another table of 6, everyone was really loud and I felt totally overwhelmed, I noticed everyone on our table looking at me after a couple of seconds and I suddenly noticed the waitress had been speaking to me! Didn't hear a word she said until I focused on her. Its the first time I've experienced my brain just melting all the noise together.