Absolutely correct - please consult with your doctor before you take any advice off of the internet. Messing around with your neural circuitry may cause more harm than good.
From what I've been able to tell, all drugs that act as neurotransmitter reuptake inhibitors (including amphetamines like adderall) have a strong potential to cause unpredictable and undesirable side effects. It seems wise to use such drugs only as a last resort to treat a debilitating condition. Lack of motivation suggests you might want to find something more compelling to work on.
Seems to me that most doctors are pretty much robots with a lot of institutionalized "knowledge".