Stress totally increases it. I'm a woman and even before my period, my fluency decreases dramatically. I can barely get a few words out before I'm out of breath due to blocks. I use some herbal supplements for my mild anxiety that I take daily. It's called Stress Care by Himalaya. I get it from my local health food store, but I know they sell it on Amazon too. Really bad days like fight or flight anxiety and I also take some holy basil tea.