Premanand Maharaj Ji
How can I stop negative thoughts and overthinking from pushing me into depression?
Change your thinking with Bhagwan's name
Negative, useless thinking (overthinking) is what leads to depression, and a mind made impure by wrong conduct feeds it. Sing and hear Bhagwan's deeds and do naam jap to stop it.
If you want to stop it, sing the divine deeds of Bhagwan. Listen to Bhagwan's deeds and do naam jap. You will get well.