Is your speech therapy working for you? Assuming you are working hard at your speech therapy, if it's not working for you, shop around for another speech therapist / pathologist. Talk to your current speech therapist. Tell them you want to achieve fluency. If you're years into therapy and you're not fluent, I don't see a down side to seeking different help. If you're fortunate enough to be near major universities, find their speech pathology department. See what resources they have, or that they can direct you to.