I always had long hair since I was a child, and i still do. My hair is waist length and I'm trying to get it to tailbone length but I haven't seen a difference in length. I wash and deep condition regularly, and moisturize in between.
Wow. Your hair is super long. I would say that everyone has a maximun hair growth length. Maybe you've reached it. I don't care as much about length as I do health. If your hair is healthy it will grow, but again... at some point your hair will stop at its maximum growth potential. If length is what you are looking for I think you've go it.