If it helps it helps, although I've always been uncertain about what differentiates meditation from just sitting in silence, doing nothing.
I also suffer from something like a generalised anxiety and agree that it's mostly bio-chemical. Mine was especially bad until about 2012 when I upped the dosage of a medication I was taking just a notch, and somehow that seemed to relieve the worst aspects of it. Since then my brain is still a little wiry, but I try to attack it with the usual, exercise, healthy food, a balanced lifestyle. Lately I've been liberally drinking a lot of sedative teas too, in lieu of alcohol, which I find helps. Usually when I treat my body right, the anxiety dissipates.
Anyway, I do like the idea of meditation, but not as a strict and rigid practise. For me, when I get tired of my phone screaming at me, and people in my life pulling for my attention, I'll disappear from the internet for a while, sit in bed and listen to some music, or go somewhere and sit on a bench. Just being in my own head for brief periods of time without my attention being pulled in 20 different directions is calming and relaxing.
So I don't if meditation will be a cure-all, but the only thing that's really helped anxiety for me is focusing on my health. I think most people tend to under-state how important good health is to feeling positive. But then, I imagine for some people the bio-chemical component is bad enough that any amount of behavioural changes won't have much of an impact.