Is there something going on in my head?
Well, I don't have a mental problem or anything, but it often gets weird and I just can't help but to ask. I'll recount several months before, around March or May last year. I was practicing Morse code, practicing with visuals, practicing with audios. After a few weeks of practice, I started hearing Morse code in my head, as in out of nowhere I literally hear it (completely random, it's not spelling out anything last I checked). I asked around about it (deleted the question though) and someone mentioned it's not normal/it's rare. Then fast forward into around November or December, I keep hearing that Morse encoded "SMS" ring-tone from a phone (it's quite popular here, heard it more than a thousand times). I kept searching for that cellular phone, but to no avail. I covered my ears with pillows, and I still kept hearing it. I then concluded that it was in my head. The end result was I couldn't fall asleep for 3 hours lying down on the bed. It's something like LSS (Last Song Syndrome, search it up if you don't know it) to the extremes (to the point that it resonates in your head and you can hear it as an audible tone not from your thoughts). Any thoughts as what may have been causing this?