Anxiety and Green Tea?

Why do I get anxiety when I drink green tea? I’ve tried the EGCG extracts and I get the same response. It’s not the L-Theanine because I take that a lot on its own. It’s not the caffeine because I can drink coffee fine. I tried google and and someone had suggested that it’s the tannins. Well berries, specially black, have high tannins and I can eat those all day long.

Is there something in green tea that is in dark beer because I get the same effect from dark beer and some lighter beers. This goes for white and black tea also… but I have the most problems with white and green teas. Thanks for the help guys/gals!