Head Injury, Speech Affected, Stuttering, Headaches, Neck Pain, Off Balance. Post Concussive Syndrome. On Xanax. Suggestion

I am being treated by work comp DR for head hit with ball at my school I work at. My speech was affected, not stuttering any more, but when the xanax they prescribed wears off,(.5 every 4 hours) I can tell my speech start to change. They they are not responsible for the speech. I have many other sumptoms, until; tehy found out it was from ball.Horrible headaches and neck pain, Short term memory loss, I walk funny, balance off, agitation from ANY emotion, can't cry, I can't stomach meat or wine like I used to, for get things when before I was sharp as a tack. Loma Linda diagnose Post concussive syndrome. I went to ER 3 days after hit with ball. Not hink ball, think stroke because of slurring and stuttering. Wouldn't that be a pysical symptom>> Dr tell me it is anxiety I felt from getting hit in the head with ball, but I say that's not true. My speech still affected since March 7th. I say it a physical symptom. What are your thoughts?