actually dom, temporary depression is a thing! it's a bit different from a bad mood, often caused by the loss of a loved one, stress, or other circumstances, but can be completely unrelated, such as seasonal(which is actually usually cause of rain/dark and bcs sun scientifically makes you happy). if left untreated it can develop into a permanent depression, which is expected.
Idk exactly how I have it, but I'd say if there's a thing between temporary and permanent I have it. It runs in the family and is pretty common in ADD which I probably have I've backed down on ADHD bc I'm not as sure I'm hyperactive. But I have a decent handle on it so for that I'm grateful.
i actually just recently was told i had gone from hyperactive to not, so i guess same hat lmao. also yeah it's super common, and also not to mention the fact that i'm an ex-gifted kid who burnt the hell out and for a while still had incredible expectations placed on me because of a previous academic track record i had fought tooth and nail to keep
also a fun side note, the only reason i actually got diagnosed with adhd as baby sage was bcs 1. my mother pushed hard for it to be tested bcs she recognized the symptoms and 2. i had adhd, more commonly found in boys and also i showed the signs more commonly expressed in boys. most girls with add/adhd never get diagnosed because it shows differently in female kids than it does boys