im honestly not sure. ive never once that one day they became an obstacle. when i was younger, id go through phases of letters i could and couldnt say. i remember when i was eleven, i couldnt say eleven or seven. there was a ton more words and letters but they were the annoying ones since i couldnt run away from saying my age. i guess highschool made me a lot worse. people werent as accepting as before, people liked to find your flaws and mock you for it. thats when i started to get quieter. I hated physics too because my teacher always tried to act cool by acting like a dick to impress people. i wonder if that kick started it