my best friend has depression. it usually gets sparked by upsetting events that happens to him.

you are lucky that your depression only lasts a day or so. my friend's can last for months and months. the last time he was hospitalized because of his depression.

you dont want your depression to get worse so you might want to go see a doctor.

and it also helps that whenever you start to feel upset or feel an episode coming on, you should start talking to someone that way you have a way of getting out all of your emotios instead of doing something that you might regret.