I have a panic disorder and I've been taking Xanax 0.5mg once a day for 3 years and i did good! and all of a sudden I've been having panic attacks everyday for the past week I am scared to take the IR. I am also very scared of getting to tired or overdosing so i only take 1 0.5mg XR once a day and in still having panic attacks after I take it. What do i do?