As „A Course in Miracles“ states, there is ONLY ONE MIND!!!
We do not share that mind because that would imply there are separate entities to share one mind, and the concept of separation is an illusion.
There is only ONE CONSCIOUSNESS, ONE MIND imagining it is fractioned and separated into stories of different bodies and forms.
Therefore, you don't have thousands of thoughts "connected to your particular story" going through your „head“ every day, you have all the thoughts that ever exist, going through „your head“ every day. Both the concept of „a head“ and the concept of time is imaginary, so it is more accurate to say that your consciousness, which is THE ONLY CONSCIOUSNESS there is, is the only home for all thoughts that exist. You are just entertaining or giving attention to some of them at „any given time“. You are, however, ONLY AWARE of the thoughts that in some way, reflect your current self-image.
Thoughts are like birds, you can't help but hear them.
However, you only hear the thoughts you believe in, because, in one way or another, you find them useful for the purpose of creating your self-image.
In other words, you are only aware of thoughts that help you define who you think you are according to your current system of beliefs.
Therefore, it is important not to resist your thoughts. Your thoughts are not "your fault". They are not the product of who you think you are. They are not the product of the personality that you believe resides in your body. They are just a filtered fraction of the endless see of thoughts that resides within you, offered to assist you composing "what you think you are" or can be "at any moment in time". This filter of thoughts we are aware of always reflects our belief system, and our belief system is always fabricated. What we believe is always as real as what we don't believe is real.
If you can't help believing your thoughts, don't resist their existence. Remember, THERE IS ONLY ONE, and THERE IS ONLY YOU. These thoughts have no other place to exist, because YOU ARE EVERYTHING THERE IS.