Where can I go to get help for my ADHD?

Where in Houston (preferably close to cypress station) can I go to see a doctor that is affordable so I can be prescribed medications for my ADHD? I grew up in foster care and when I turned 18 back in 2006 I have been trying hard to manage without meds. And I'm at my wits end its ruined everything for me over and over again. Nothing seems to work. I need somewhere that can prescribe me Adderall or a generic. My anxiety and depression that are side effects are crushing me.