I hate to say it, but exercise, preferably cardio. The gymbros and fitfluencers were right about this one particular thing :(

I think many, many of my emotional problems were just having - literal - pent up energy. Blood sugar or whatever. Walking and running sweats away the anxiety.

That said, I love getting into fights with strangers online. So it's hard to say

Ah, thank you. I was fearing that. I walk a lot but I don't think it's enough anymore..

Are you hungry or thirsty? Either of these can make your physiology ramp up.

Other than that, I’d recommend to go towards the extremes. Either work yourself tired or meditate until you are still. If you tend to get a lot of exercise normally I would start with meditation, if not get up and move.

It could be that you'd benefit from something more vigorous or frankly stressful. I had a period where I didn't do much besides very leisurely activities - was injured and had to stay in bed, recovered. Not just physically but also had no external demands. My stress tolerance went down and I was hyper all the time, but I started literally playing fps games and high intensity cardio (the kind of where you go hard for a minute or two and have to take a break) to get adrenaline flowing in my body and get used to it again.

This is very true in may case