Honestly? I found being properly medicated for my ADHD got rid of most of my anxiety. Most of it was around executive functioning stuff - remembering the millions of day to day things. Work tomorrow, trash day, make that appointment, where's my keys, did my alarm go off, where's that sticky note, do the dishes, do I have a clean shirt for tomorrow, did I talk too much, did I not talk enough, do they hate me... It went on and on.
When I finally got on the correct meds, my husband pointed out that I was so much calmer. I was able to dismiss the anxiety easier when it appeared and could more easily find the root of it and see it for what it was, which made it dissipate quickly.
ADHD meds are usually inexpensive. I take a slow release in the morning and 5mg regular in the afternoon when it wears off. On weekends or days I don't need to, I don't take the afternoon meds.
Your mileage may vary, but it's worth thinking about whether medicating one issue properly might have a cascading effect.