What should I do about the many accumulated oaths I have made by swearing to compel myself to utter the intention of prayer in order to get rid of the whisperings that prevent me from uttering it?

The cure for obsessive thoughts is to ignore them and not pay them any mind. As for the oaths you swore or broke under the influence of these obsessive thoughts, nothing is binding upon you, because you are in the position of one who is compelled, and one who is compelled is not held accountable.