Does the impurity of prostatic fluid reach the bedding if the hand touched the bedding while having prostatic fluid on it, and does the body become impure if it touches this bedding after it has dried? Is the feeling of a desire to invalidate one's ablution and hearing a sound or feeling something exit a delusion or a reality, especially if this only occurs during ablution?

You must turn away from obsessive whispering (waswasah) and not pay attention to it. Cast all such whisperings behind your back. As for impurity (najāsa), it does not transfer from a dry object to another dry object. If the impure spot is wet and encounters a dry object, there is a difference of opinion regarding the transfer of impurity, and you may adopt the view of those who do not consider it to transfer. Your feeling of your ablution (wudu') being invalidated is a whisper from Satan (waswasah), so do not pay attention to it unless you achieve absolute certainty that something has exited from you.