In my experience, the peak of adderall withdrawal symptoms are within the beginning of the first week of detox. Afterwards, it's cake, especially when supplemented with EXERCISE. My advice would be to create a couple free days off if possible (school and jobs are worthless compared to your health, especially while detoxing from drugs), SLEEP IT OFF. Your psych will jump back into place eventually, and once your comfortable, only take therapeutic doses when ABSOLUTELY needed to avoid abusing them again because they are so detrimental to your body in the long run.
When I went cold turkey from a decent tolerance of daily use for a couple months, I literally stayed in bed from early evening to late afternoon the first night until I forced myself out of bed to eat out my pantry. Did some weightlifting, and passed back out for basically 2 more days of the same cycle. It's all psychological with adderall, and the endorphins released from exercise and recovery with proper nutrition (PROTEIN!) make it so much more bearable. Just take care of yourself, and understand your outrageous fatigue is temporary as you're detoxing.