What are the rulings on purifying from pre-seminal fluid (madhiy) if it touches the bed, and does touching or kissing one's husband necessitate repeating ablution (wudu'), and am I sinful for not informing my husband about the obsessive-compulsive disorder (waswas al-qahri) that has afflicted me?

Whispers (Waswas) are from the stratagems of Satan, and one must turn away from them and not succumb to them. One should rely on Allah concerning matters of marriage and forming a family. The basic principle is the purity of the bed (or bedding), and anything whose impurity is doubted is not ruled impure except with certainty. Touching the husband does not invalidate ablution (Tahara). There is no sin in not informing the husband about the illness, but one must strive to cure it by turning away from the whispers.