It could be over a few months, like a new job where one day you feel like actually going to work thinking, hey I actually like these people and don’t mind working here.
Or when your friends have been super busy for months and suddenly you get matched on dating apps, old friends reach out and people want to buy your old junk on Craigslist in a single day.
Oh hey, I used to be in a band with someone who had bipolar disorder. It was… difficult. For everyone. He hasn’t been diagnosed yet because he developed it suddenly. But yeah, he quit his job that he had for over 5 years. Suddenly started spending absurd amounts of money on stupid things (like $500 sunglasses). He sudden thought he was the protagonist in life and that he was invincible, so he would drive on the wrong side of the road and shit.
I’m not religious, but I thought he was like possessed by a demon or something. He just wasn’t himself anymore. It was like someone else took over his body.
Anyway, this was 10 years ago. He saw therapy. He has been medicated. He’s doing a lot better now.