Self diagnosis is a spectrum (oh how I start hating the word... please provide me with another...).

If you have never self diagnosed that something at all is wrong, you don't even end up at the docs. Unless someone locks you up or similar.

That is the first step. While you wait for your appointment, it is just normal curiosity to try to see what it could be. Oftentimes it is quite important since many people with "just" anxiety fear they will be locked up because they heard stories...

Also...having an Internet community supporting you can be important, even before you get a DX, because you know you are not alone. Even if you didn't get the self DX 100 % right, you could meet people and see that... this exists... it has a name. It can be the push you need to dare going to a doc.