After having methylphenidate for about 20-25 days of 30mg dose on the prescription of doctor my mind is not working.i cant feel any emotion like stress,tension,happiness,attraction.feel like there is no emotion generating in my mind.it is really hard for me talk someone or write.also I have left the medicine 4 month ago, but the effect of medicine is remain as it is,plz help me what can i do next.yes i had depression too  but doctor has given me venlor xr that also work my depression is ok.plz tell me what can i do to recover from this because i cant exprience anything .