Types of Concentration?
It might be difficult for readers to understand exactly what you're experiencing in your meditation. You learn techniques of meditation to get you started on a path, but eventually that path must be understood by you, personally. You become like a scientist experimenting with what works and what doesn't work. For that you have to know what &quot;working&quot; even means... as you develop your path, this is an essential aspect to understand. What am I trying to achieve here when I sit down to meditate?
The path the Buddha described made Tranquility and Insight the markers of progress. If what you are experimenting with, within your own mind and body framework, moment to moment, is (over time) leading you to more and more calmness of mind, calmness of body, then you might be able to consider whatever methods you were employing successful.
Similarly, if whatever you are experimenting with, within your own mind and body framework, moment to moment, is (over time) leading you to deeper and deeper understanding of the nature of reality (three marks of existence), causing you to see more finely these qualities, subtler and subtler in your experience, then you might be able to consider whatever methods you were employing successful.
Both these two developments, Tranquility and Insight, should lead to letting go, fading away, cessation of your experience, in a gradual way.
AN 4:170
Mindfulness of the breath is a common practice that can develop both of these to their fruition.
SN 54:13
As you practice in this way, the Four Establishments of Mindfulness should simultaneously be developed.
MN 10