No more than ever before.

All I’ve been thinking about is WW3 and this shit makes me want to vomit.

We lived through WW2, most of us anyhow. Some times are harder than others, but let me tell you something. One of favorite cartoons of all time has a fairly flat character, who's catch phrase is, "We're all gonna die." It's her custom version of yolo before yolo was a thing. No matter the choices, precautions or risks, we all have to die eventually. It'll happen regardless of how much we stress about it. Or how little.

I can’t even smoke weed anymore without having a near panic attack.

Ah, that makes sense. Pot tends to heighten anxiety over time. Talk to any of the old guard, and ask if the ever struggle with anxiety since stopping, or when they are clear.

the Doomsday clock is

Is someone else's crystal ball. It doesn't hold any power over your future.

just stop for one day and enjoy one day of peace?

Turn your phone off for 24 hours, take a stroll outside when it's daylight, and forget about anything but real life for a day. Step away from the news. Don't talk to people about politics. Get some distance while focusing solely on the moments that come your way. That will be your day of peace, and whenever you need another, you know what to do.