What should a girl suffering from obsessive-compulsive disorder do regarding ablution and prayer, when vows and oaths to stop praying have accumulated upon her, and she does not know their number to expiate them, and she feels air escaping during prayer without knowing its source?

The cure for obsessive whispers (waswasah) is to turn away from them and not pay them any attention. If you made a vow or swore an oath under the influence of waswasah, and your free will was taken away, then there is nothing upon you. However, if the oath or vow was made by your own choice, then for every oath or vow, you must offer an expiation for an oath (kaffarat yamin). If you do not know their exact number with certainty, then act based on investigation and offer expiation for what you predominantly believe will absolve you. Do not return to such matters and strive against yourself to repel the whispers.