Good luck. After 65 years at 70, I became fluent. It was through psychotherapy that allowed me to deal with the trauma of an abusive childhood. It wasn't the first time I'd had both Psychological and Speech therapy but this time it was successful. Keep working on your emotions. Even if the stuttering wasn't triggered by emotional trauma, the trauma of being unable to speak fluently and the associated anxiety is, in itself, enough to warrant psychological therapy. Please keep the group informed how you’re doing. Others might follow your example if you have success. Sue