How many weeks of depression are needed to be diagnosed with depression?

Hello. Lately, I've been feeling consistently depressed, so I wonder if I might have depression and decided to write this. At first, I thought it was just a tough period and ignored it, but for several weeks now, my mood has been low, and I haven't wanted to do anything. How long does this kind of feeling have to last before I can be diagnosed with depression?

I usually just thought I was feeling a little down for a moment, but since time has passed and I haven't gotten better, I wonder if I might have depression. Everyone around me says it's just a temporary slump and that everyone goes through it, but I don't understand why I keep feeling this way. It's so hard to get up in the morning, and I'm even afraid to start the day.

I read online that if feelings of depression last for several weeks or more, it might be worth suspecting depression, but I'm confused about exactly how many weeks should be the standard... I'm just wondering where I should go for a diagnosis, whether I need to visit a hospital, or if I should seek counseling. How much longer do I have to feel this way before going to the hospital is the right choice?

Has anyone else experienced long-term feelings of depression like I have? I'm curious whether this state meets the criteria for a diagnosis of depression, and once diagnosed, what steps should be taken to start treatment. Even small advice would be appreciated, and I would be really grateful if we could share many stories.