I have been on Vyvanse for the past 9-10 months and my psychiatrist put me back on adderall because I felt the Vyvanse did not help me concentrate at all. I was on 50mg of Vyvanse and now I’m on 20mg of IR Adderall 2X/Day. I have felt like I’m in a complete fog... basically like I’m awake in a dream. Why is this?