hi, thank you for providing a brief history of you. first I will like to say, take the name of God and get yourself calm. we do have specialist who can help you figure out the reason for your verbal disability. as you mentioned you had a brain injury, we do not know what was the type of injury you had as you haven t mentioned. also to focus here is, that the area involved during the brain injury must have led an impact onto the speech center in the brain. which must have damaged the tisses there. Depending upon the area in the brain injured the symptoms comes. in your case it is speech. I will recommend you to first see a neurologist and take a fresh MRI and compare the old & new MRI to figure out the changes in it. post that as your neurologist will feel you may be advised to meet a speech therapist. who will surely help to the height of getting your speech back. sometimes use of diagnostics with precision helps together to get the best outcome in many patients. also to mention, do regular breathing exercises, and meditation . as breathing exercises will help improve the oxygen carrying capacity of blood and help the tissues nourish in brain and meditation will help you calm down which will assist you to take proper decisions and help you recover better. with the grace of God I wish you a speedy recovery.