ADHD Treatment for 19 year old?

TLDR at bottom for those who don't want to read

So I've been going to the same family pediatrician my whole life (19 years) and he's generally been a good doctor. I've have ADHD symptoms my whole entire life, i couldn't sit still, impulsive, promised myself i'd organize my school backpack (lasted 1 week max every year until I just started shoving papers in it & forgetting). My parents had no idea what ADHD is, since they're from asia and I guess invisible mental illnesses dont exist there. The reason I'm really seeking help now is because It didn't really negatively effect my life until now, that it's effecting my work.

Once I turned 12 years old, I've realized that my whole entire life in school I've never acted like my peers. I've always been more "energetic" and couldn't sit still at all. They literally had to put one of those pedal things under my desk in class (that did not work, i rather fidget my own way). Anyways, one thing led to another & people started telling me I act like someone with ADHD, someone with ADD, OCD etc. I never knew what any of that meant, or that it existed. So I went online & searched the symptoms, and when I found out what it was, it was like reading my whole entire life.

When I told my doctor about it about 2 months ago, he told me it's all in my head & people in asia don't have time to think around, resulting in ADHD (my reaction is the same as yours) Every time we told him before, he brushed it off "stop playing video games" "sleep more" I didn't really care, because I didn't think it really mattered, but this time I was adamant on getting diagnosed and treated. He told me to sign up to the military, and for me to get a job. I told him I do full time video editing currently and shoot videos, he told me get a "real" job like a cashier at mcdonalds or walmart. At that point, i stopped listening to him and just went home. He then referredme to KingHaven counseling group in katy, and after reading the mostly 1 star reviews, accompanied by the obviously faked 5 star reviews in order to offset the reviews, I cancelled the appointment. Didn't want to get misdiagnosed with depression, bpd, etc. What's the move for me right now? holy s**t im writing way too much nobodys reading this read what i write under this

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TLDR: ADHD symptoms seem to be getting worse, starting to effect my life now, i want to get it diagnosed and treated before it's too late. My adult life is just starting, and it's already setting me back hella. Doctor gave me bs responses, he thinks i'm "seeking". I need a trusted place to go to in houston/katy area with someone actually experienced in this field. please help me