What is the ruling on the prayer of one who doubted a wet dream and found a small amount of clear fluid, then performed ghusl and re-prayed the prayers he was doubtful about, and what is the ruling on the clear, yellowish fluid that continuously exits, and does it necessitate ghusl?

Ghusl is not obligatory merely due to doubt about seminal discharge; rather, it becomes obligatory upon certainty of its emission. Continuous yellow discharge is impure, necessitating istinja' and wudu'. If its emission is continuous, your ruling is that of one afflicted with incontinence (sahib al-salas): you should take precautions and perform wudu' for each prayer after its time has commenced.