How can you handle the amount of internal dialogue that is normally part of the anxiety and depression thinking cycle? Overthinker.
I remember an old saying, that "talking to yourself is the first sign of madness." Personally I find it's the only way to guarantee intelligent conversation. Either way, we may not all do it out loud, but in our own heads we all talk to ourselves.
Therapists have a great way of making up labels that state the obvious: In this case, we call it "self talk". It's that burble of chatter that's going on inside our head whether we're aware of it or not. When I was trained we would talk about the "tape" in your head, but these days we should probably describe it as the "playlist".
So it's human and normal. But what is it that you say to yourself, and how do you say it?
The way we talk to ourselves, kindly or not, defines the quality of the relationship we have with ourselves. At the risk of getting too philosophical, it is us. But for people who suffer from depression and anxiety this dialogue can feel like a runaway train of fear and self hate.