What is the ruling on swallowing saliva that contains small food particles after Suhoor, and does it invalidate the fast if these particles are not expelled despite attempts to clear the throat?

The obsessive whispers have taken a great toll on you. Our advice to you is to completely disregard these whispers and pay them no attention. If you have eaten suhoor, do not worry about what Satan puts in your heart regarding the persistence of these mentioned particles. Some jurists have gone so far as to say that swallowing what is between the teeth does not invalidate the fast. You may adopt this opinion as long as you are afflicted with such obsessive whispers. Do not clear your throat or exert yourself to remove these particles, for they are likely not there. Rather, once you have eaten suhoor, continue your life normally, unconcerned by these whispers and paying them no mind.