You say it yourself - you should not feel anxious given your situation, but you do. You need to address your baseline anxiety. Anxiety always finds some reason "why" (i.e. current instability, war...) but often the root cause is deeper and personal - I am speaking from a personal experience.

Consider therapy. Other things might help as well. Sleep more. Rest more. Work less. Find time for some physical activity. But at least in my case, finding and addressing the root cause(s) was the key (followed by years of un-learning of some unhealthy mental patterns).