What is required of me regarding the prayers, fasting, and ritual baths that I doubt were valid or properly performed during early puberty?

Scholars differed concerning one who doubts having performed the prayer after its obligation became due. The Hanafis held that there is no make-up incumbent upon him, while the majority of scholars held that making it up is obligatory. A person afflicted with Waswās (obsessive doubts) may act upon the opinion of the Hanafis, and thus does not need to make up any prayer or fast about which she doubts its obligation. However, concerning what you are certain you missed, the majority of scholars hold that making it up is obligatory.