What to do with low mood

Hey. I'm not asking for a diagnosis, so I'm not really gonna put many details about my own experience here but I struggle with low mood but not every day. I don't think I'm depressed because I'm absolutely fine sometimes but I have a low mood enough that its effecting my life and relationships etc.

Those of you that have experienced this when did u decide to see somebody, and what happened? I don't want to bring it up to my therapist (I see one for anxiety), go through a load of admin then just be diagnosed with a bad day. Is there anything that they can do to help with low mood that isn't severe enough to actually be depression, besides just like eat healthier, go outside more ✨

Thanks :)