95% of “overthinking” is unprocessed emotion wearing a rational disguise. You don’t need more logic. You need to feel the discomfort you’re avoiding.

go. That is why we need to treat emotions and thoughts in the same way we treat those corporate reports, as mere position papers, subject to our evaluation, rather than as representations of solid reality leading to action points.
Susan David • Emotional Agility
The goal is to be as accurate as you can about what you truly feel emotionally.
Daniel Beaver • Love Yourself: The First Step to a Successful Relationship
When letting go, ignore all thoughts. Focus on the feeling itself, not on the thoughts. Thoughts are endless and self-reinforcing, and they only breed more thoughts. Thoughts are merely rationalizations of the mind to try and explain the presence of the feeling. The real reason for the feeling is the accumulated pressure behind the feeling that is
... See moreDavid R. Hawkins • Letting Go: The Pathway of Surrender
You can’t go against your gut feeling. The gut is what decides. The mind is what rationalizes afterwards. — Naval Ravikant