Must I make up the prayers and fasting after the emission of semen in Ramadan without being aware of its ruling, given that I do not know their number? Are my prayers valid that I performed after puberty, even though I was not regular in them? Am I sinful for wasting water due to obsessive thoughts during ablution? What is the ruling on inserting a finger into the vagina to ensure the cessation of secretions? Is it permissible to perform ablution at home and pray at the university with secretions, then repeat the prayer at home?

The whisperings (waswas) you are experiencing are remedied by ignoring them. General repentance (tawbah) is sufficient for all past sins, and you are not required to repent for each one individually. Doubt about the emission of semen does not invalidate the prayer unless certainty is attained regarding it. A person afflicted with whisperings (waswas) is permitted to adopt the easiest rulings. For purification (istinja'), it is sufficient to pour water over the site of impurity until you predominantly believe it has been removed; using soap is not necessary. Prayers and fasting performed before puberty do not need to be made up. The default state is purity when in doubt about having been afflicted by impurity.