If you’re now over 16 and your stutter hasn’t gone away, you’ve likely got it for life. Yes, there are fluency shaping techniques you can consciously use, but your stutter will remain with you for life. Sorry, but these are the facts. Start seeing a Speech Therapist. The earlier you get onto it, the better it will be, but only IF you dedicate yourself to using the strategies every single day, otherwise you will relapse.