For those who are totally consumed by this- I understand, I get it, I have severe anxiety too and it was becoming quite all consuming for me last week, but this could go on for a long time and you can't sustain this level of anxiety forever - it's really unhealthy.
Don't beat yourselves up for this situation not being within your every waking thought and don't castigate yourselves for continuing to enjoy aspects of your life. How privileged we are to be in a position where that's possible - you can appreciate that and still be empathetic to the plight of people in Ukraine.
There are many levels of escalation before this ends in all-out nuclear war and, whilst it's possible - that's always going to be the case whilst countries have nuclear weapons - it's still not likely, most people want to live, both in Russia and the West, which is why they'll be working hard on both sides to ensure we never get to that point.
I wasn't alive during the Cold War, but I suspect it would have been just as frightening, if not more so, then as now if there had been access to 24/7 news, sensationalist headlines and lunatics on social media shouting that we're all doomed every 10 seconds. I also understand the anxiety to doomscroll and fixate yourselves on the subject of your anxiety, but take some time away from this thread and the news. Sometimes the best thing you can do for yourself is take a step back and live in the moment, wanky as that sounds. We're all going to die at some stage and most of us will have no idea as to when - enjoy the time you've got, it's precious, you can waste so much of your life worrying about things that are outside of your control and may never come to pass. Whilst you're worrying about life ending, it's literally happening around you. I know that sounds trite but my biggest regret is the first 18 months of my little boy's life that I spent diagnosing myself and obsessing, pointlessly, over whether I had a life-limiting illness - I'll never get that time back. Take back control of your response and do what you can - donate to the Red Cross if you can, offer whatever kind of support you're able to that is needed, beyond that, this thing is outside of your control.
Don't be afraid to seek help if you really are finding it all-consuming. It's rational to be concerned, it's rational to be sad for people in Ukraine, but unless you're there it's not rational to be allowing that to impinge upon every aspect of your life and you may benefit from some professional support.