What is the ruling on prayer if the worshipper experiences doubt during it regarding the emission of madhy, then becomes certain of its emission after concluding the prayer and verifying it?

If you suspect the emission of prostatic fluid (madhy), the basic principle is that it has not been emitted. Therefore, continue with your prayer unless you are certain that your ritual purity (tahara) has been invalidated. You are not required to inspect. However, if you become certain after the prayer that it was emitted, its emission is attributed to the latest possible time. If its emission could have occurred after the prayer, then your prayer is valid. Otherwise, it is invalid, and you must repeat it.