Hey Defiant Panda.
I understand being unsure about the diagnosis thing. There's pro's & con's to getting one & not getting one. More like it's all a bit of a grey area than black & white.
Personally I've found it really helpful to finally have a correct diagnosis. I had a diagnosis for many years although it was incomplete/incorrect. My symptoms/behaviours/feelings all make a lot more sense now (to me), and it has helped me to start to let go of the beliefs that they are character flaws, which I felt plenty of guilt and shame about. And also felt not in control of, because as much as I wanted them to change or not be there, nothing I did seemed to help. I felt powerless I guess. To have acceptance I had to let go of some ideas and beliefs. From that though I'm learning new ways to manage my experiences & symptoms.
Maybe in choosing not to get a diagnosis, there is some sense of keeping some power & choice for yourself.
I do make an effort to be aware of the label thing & not buy into it. I want to use my diagnosis as a tool to navigate & learn to help me be myself, rather than a label or box that restricts me. I think that is a big part of what dosen't work in our medical system - it's all about breaking things down into smaller things, instead of looking at the bigger picture. And it's focused on illness and disease, rather than on wellness & a whole person. There is a lot of stigma about mental health, I think it's helpful to be aware of ourselves and notice when we might have picked up beliefs about mental health differences being 'bad' or something to be ashamed of.
So I guess you don't need a diagnosis, because you don't have one yet and you've made it to here! Although it may be really helpful. Like you said that as far as you know medication is the only treatment, if you had a diagnosis you could learn about it and maybe find other things that help too. It can also be a bit emotional & take some adjustment when you get a diagnosis, so it's good to be prepared for that and maybe have someone to talk to about it, if you decide to go down that path. Also it's a good idea to make sure you have a really good psychiatrist or whoever is qualified do the diagnosis. They don't all get it right!
Best wishes.