Well, to begin with; if you really do think you may have ADD/ADHD and absolutelty need medication for it in daily life,
Tell your mom; I can't say for certain how supportive she will be about getting you proper medical care, but from what it sounds, she knows a thing or two about the medication and how it can help.
But to answer your question: There are literally
dozens of old-school combinations which contain amphetamine in them but the most used now adays include:
Dexedrine: Pure d-amphetamine (prefered for work/recreation)
Adderal: 72%/28% d-amphetamine/l-amphetamine mix of salts (no idea why it exists)
Methylphenidate (Ritalin/Concerta/Daytrana): Not technically an amphetamine but a stimulant the same
Edit: Vynase: Pro-Drug of d-amphetamine, converts to d-amphetmaine in body:
Shouldn't be snorted for effects.
All "snortable"; though I hate doing that as the uptake is too sharp (head-ache) and the crash too intense to be any fun!
Start off here and check out the "Anti-Obesity/Anoeretics" sub-menu if anything is too exotic. [At the very bottom of the wiki-article]
http://en.wikipedia.org/wiki/Amphetamine