What is the ruling regarding frequent doubts concerning prayer, ablution, and the transference of impurity—given the presence of urinary incontinence, prostatic fluid, and flatulence—and what is the validity of past prayers, and what is the ruling on removing hair with a women's cream, and is it permissible to pray sitting on a chair when feeling pain, and what should I do with clothes and money about whose source I have doubts, and must I disregard the obsessive thoughts about driving and what results from them?

You have reached an extreme level of obsessive thoughts. You should consult a trustworthy doctor and completely disregard these obsessive thoughts regarding prayer, purification, money, driving, and other matters. The default is that impurity is not transferred, and nothing exits from you unless you are certain of it. If you are certain that drops of urine have exited, then review the fatwas related to urinary incontinence. If you suffer from incontinence that does not stop before the prayer time expires, then perform ablution (wudu') and pray, and whatever exits from you will not harm you. You are not required to make up prayers based solely on doubt. For one afflicted with obsessive thoughts, it is permissible to adopt the easiest rulings to alleviate hardship. Hair on the leg, about which no specific ruling is mentioned, is permissible to remove with any hair remover.