What is the ruling concerning my prayer after I accidentally doubled my clothes, and it was later discovered that there was a child's urine on the bed, while I am not certain if it touched my hair or clothes before the prayer?

It appears that the questioner is afflicted with Waswasah (obsessive-compulsive disorder), and she must strive to cure this ailment by ignoring it and not paying attention to it. Indulging in it brings evil and squanders the interests of both religion and worldly life.

The basic principle regarding the body and clothes is purity. A judgment of impurity transference is only made with certainty of contact, and not every contact with impurity results in its transference. The questioner's prayer is valid based on the principle of purity. She should always adhere to this principle unless there is certainty to the contrary, which is important for those afflicted with Waswasah.