My neice had vague abd pain followed by incessant belching. This gas been going on for 3 1/2 months. She’s not been to school since this started & has lost over 10 lbs. Now she has left leg involuntary jerking to the point where she will fall off a chair & has difficulty walking. She also has started spontaneous verbal outbursts.-letting out a yell suddenly. Lansaprazole, atarax, resperidone & chlorpromazine have been unsuccessfully tried. No dx. Yet! Any suggestions?