Looks anxiety. Take anti anxiety drugs and reduce ur stress levels

Hello , read your question thoroughly. You have put forward it really smartly I think if you are having the breathlessness inspite of all the normal reports it is very likely that it’s non cardio respiratory origin . Considering the current scenario of covid it is very much likely a generalised anxiety . Don’t worry it’s very common . You need to be away from negative vibes . Use relaxation techniques and meditation.