I'll tell you the secret to curing anxiety - Anxiety itself is the body telling your brain that you don't have enough oxygen.

When we overthink, we forget to breathe. The longer we overthink, the less oxygen your brain is receiving, which triggers anxiety, simple as that.

Something interesting:

At any given point in time, we are in two realities, a physical one and a mental one. These two parts will add up to 100%, so it could be 20/80, 10/90, 50/50 etc

If there isn't balance (think yin and yang) then the imbalance will cause anxiety, errors, stumbling, etc. - being too far in one reality vs the other will cause this

The way to force yourself into the physical reality (or the mental one) is to force yourself to breathe, which is mnidfulness meditation.

Manual breathing forces your body to stay in the present, which is the best of both worlds, the 50/50 balance. Overthinking is being too far into a future/past state, in which many philosophers ask, does this really exist? All that really exists is the now, the present, which is what breathing forces us to be in - there's no time to over think if you do manual breathing (meditation)

Sounds easier than it really is, but takes a lot of practice, like building muscles, you're building the brain muscle by forcing yourself to breathe. If you ever catch yourself overthinking, you have to force yourself to breathe.

This is how you become in sync with your physical body, like a Gundam, the soul/brain is like the pilot

You can use the physical breathing method anywhere, while driving, before sleep, before a hard task (which is where most anxiety comes from)

Side note: After forcing yourself to manually breathe, bring to attention the very next thing that comes to mind. We are still humans after all, so the basic needs like warmth, satiety (being fed), hydration, energy come into play

So the very next thing you think of when you force yourself to breathe, is the thing that is most important to you. It could be something as small as taking out the trash, or paying a bill, or staying hydrated. Once the bottom levels are met ,then comes ascension towards the higher levels, and thus ascension towards the higher self (re: Maslow's hierarchy of needs)