It will buddy. Keep going. Hypnotherapy seems like a nice try. Speech therapy too. You will get better is just a mather of giving enough tries. Don´t give up. Be like Rocky. I don´t stutter on my own too. What I do that helped me is just talking aloud and hearing myself speaking fluently. It sounds a little bit like schizophrenic (the talking alone part) but I´m re-afirming the fact that I can speak fluently. I just have to adapt. Bring the same mental state I´m when being on my own but with other people. Then just talk.