What is the ruling concerning the prayers and fasting performed by a woman who was unaware of the obligation of ghusl upon her after a wet dream or thinking about intimate matters, or the obligation of wudu' due to certain discharges?

Nothing is entailed by a wet dream except seeing the fluid. Fasting is not invalidated by a wet dream or by thinking about desire, even if semen is discharged. As for prayer, you are obliged to make it up according to the majority of scholars. The same ruling applies to prayer after the emission of discharges that nullify ablution. We hope there is no sin upon you for your ignorance, and we advise you to learn; for learning the rulings of worship is an individual obligation upon everyone concerning what is essential for each person.