> Am I wrong to be concerned?

Fortunately yes.

There are very long and well-respected traditions when it comes to nukes, and despite Russian propaganda and shitposters going on about nuclear tidal waves and other nonsense, serious diplomats have maintained that nuclear policy remains the same, which means they'll only use nukes if there's an existential threat to Russia (which getting their ass handed to them in Ukraine is not), or enemy nuclear strike (which we aren't about to do).

Here's a deep dive from someone smarter than me in these things, it put my mind at ease and I hope it works for you too: https://www.youtube.com/watch?v=sxOO0hCCSk4