How to know if i suddenly developed amnesia?

Examples below: Bilateral damage to the medial temporal lobe or medial diencephalon is associated with a syndrome of amnesia that has been widely studied (Scoville and Milner 1957; Squire 1992; Zola-Morgan and Squire 1993). The memory impairment is characterized by intact immediate memory, marked anterograde amnesia (i.e., impaired new learning), and variable, usually temporally graded retrograde amnesia (i.e., l