You'd be surprised by the non-mental triggers for anxiety; weather changes (humidity levels, dry levels, smoke/sand particles/pollutant particles), environmental changes (home, apartment, neighborhood), routine changes, hormonal changes, nutritional deficiencies, blood diseases, heart disease, thyroid disease, medication combinations, food allergies or intolerances, acid reflux, the list is infinite of triggers for anxiety that is not related to mental illness.

Also, and most importantly: COVID has caused everyone to experience anxiety and trauma. Experts surmise that this pandemic can trigger everyone to develop PTSD symptoms. Long-term mental health PTSD effects of Covid-19 pandemic, explained

So, what you are experiencing -- the random attacks of anxiety -- is 100% likely due to the way the pandemic has disrupted your own life.