When should I visit a hair loss clinic?

Lately, it seems like I'm losing more hair when I wash it, and my hair feels thinner than before. It doesn't seem noticeably severe yet, but when I take photos, the top of my head looks a bit sparse, so it bothers me for no reason.

People around me say that hair loss should be managed in the early stages, but I'm not sure at what point I should visit a doctor. I worry that going too early might be a mistake, but I'm also concerned that starting treatment late might cause it to progress further.

Has anyone else visited a doctor suspecting hair loss like me? I am curious to know how much hair you were losing before seeking treatment, and whether you were advised to get medication or treatment even in the early stages. I would appreciate any experiences or advice on whether I should wait until symptoms worsen before visiting a hair loss clinic, or if it is better to go immediately if I feel even the slightest abnormality. 😊