Bro I was also very severe few months to a year ago. Couldn't even say a full sentence properly. I was going for speech therapy back in my high school days grade 11/12 but , I was to immature at that time to take anything serious. Even after finishing school I still struggled with it immensely. Couldn't get jobs , I felt ashame talking to girls , I had a lot of friends but mostly for playing sport...on a social communication level , I never really mixed well with them. Now I'm 26 years old and I still have the problem. It's bad at certain times if I rush to much. But for these past few months I've been practicing very hard alone at home and learning intensively on how to slow down my sentences. I think now I'm like 30% better. I'm even better when I pause and speak after every one or two words..I speak almost fluent. But this year, once I get a job , I'm going to visit a neurologist to try antipsychotic medications...heard a few meds really help. Maybe you should try it as well.