I have a speaking disorder, is there surgery or medication that can help?

hi I’m (…) from ethiopia. my problem is speaking disorder meaning that i know what to say but i can’t say it. i repeat words , difficult to say some words and if i speak much i have a pain in my jaw (my mouth). so is there any medicine like surgery or other solution to fix this problem. and one thing is that so many people says me that i speak well when i was a child but when i grow this problem came