Overthinking a worleide issue and it's a issue that everyone is facing in this world. 

Overthinking is a bad habit and there was a time when I get addicted to it too. And now I m much better from that situation. 

Overthinking will lead you to depression and anxiety these are worst stages of overthinking and can lead to death too. 

Coz last point is suicidal try. When an over thinkers crosses all stages then this comes the last one. After this you even don't have your life's. 

So please stop overthinking.