Adderall and cold turkey

I start taking Adderall, xr about 9 months ago. At first I had the expected side effects, dry month, restlesness, loss of appetite. I felt extremely alert, and much more focused at work. My husband even noticed my attitude was much more calm and relaxed, which made him much more calm and relaxed. So it seemed like it was a miracle drug. Well, here lately I have been feeling more tired and unmotivated than I ever have in my entire life. I have been taking 10 mg since I began, and usually only once a day for only the days I work. I never take it on my days off. So I am not sure if that is the problem. And I am not sure if it is because I need up my mg, but honestly, I feel that it is not worth it in the long run. I am beginning to think my body is reacting because I need more, and I refuse to do that. So my results are worse than when I started 9 months ago. I have decided to stop cold turkey and very concerned about withdrawl effects. But I would rather go through that than the rest of my life be dependant on a medication that is obviously messing with my body.