Is two weeks too soon to ask for increase in dosage? Two weeks ago my psychiatrist prescribed me Adderall for the first time (10mg XR once a day in the morning), and I feel like the effects don't last nearly as long as I hoped. It makes me feel more awake/focused for the first 2-3 hours before I become tired and unfocused again. 

I'm worried about coming off as drug-seeking because I'm a college student and it seems like my doctor has had prior experience with drug-seeking college kids. I'm not sure how to ask my doctor for an increased (or second) dosage, and I'm wondering how long people usually wait before requesting the first dosage increase to their doctor. I really don't want to end up losing my script by coming off as too eager for more meds. 

Any advice would be greatly appreciated :-) Thanks!