I had hot flashes for over a year after covid infection and never experienced anything like it, I likened it to menopause on steroids. It also came with heart palpitations which added to the stress but I started noticing that the more I stressed about it, they would get worse and more often. I’ve have definitely found a connection with stress and the covid symptoms, the more anxious I got, the symptoms would come back, there’s definitely some underlying connection between stress and covid symptoms but it’s just my opinion. I do know that stress can and does affect everything so it’s not impossible to believe that it can also affect your symptoms. On days when I feel better and more optimistic about things I usually have a an easier time and the opposite happens when I’m not feeling strong.