Causes of forgetfulness of past memories or something that happens a day or two ago (21 years old) ?

DEPRESSION: Based on what I hear, I wonder if you're not experiencing depression? Get an evaluation from a psychiatrist to help identify what depression means to you and whatever else may be bothering you. Consider recommendations for medication if any are given. Get a referral for a reputable psychotherapist to speak with. Meds and therapy combined are most optimal; no just one or the other