What is the way to overcome the obsessive whispers regarding purity and prayer, especially with the feeling that the prayer is invalid, the ablution is broken, semen or urine has been discharged, and the inability to control fear and anxiety during worship?

The optimal solution for obsessive whispers (waswas) is to disregard them and pay them no attention. If you doubt the emission of urine, a wet dream, or the invalidation of ablution, act according to the fundamental principle, which is that these things have not occurred unless there is absolute certainty. If you doubt having omitted something in prayer, do not pay attention to the doubt and proceed with your prayer. With perseverance and supplication, the obsessive whispers will, God willing, disappear.