How long have you been on Adderall? I think you are taking the right approach by taking yourself off the medication. And it's best to do it the way you described, slowly over the course of a week or two. As you suspected, you probably never needed to be on it. A lack of sleep can affect you in so many negative ways. Do not take anything, especially stimulants, if you suspect you don't even need them.Give it a try and see if you can function without it.