Overthinking is linked to psychological problems, like depression and anxiety. It's likely that overthinking causes mental health to decline and as your mental health declines, the more likely you are to overthink. It's a vicious downward spiral.
I will stand my ground.
I won't just stand around.
God is not pushing you, He is preparing you. Trust His plans not your pains.
God sometimes take us into trouble waters not to drown us but to cleanse us.