Hi,
I'm new to the forum, so first of all glad to be here.
I've been interested in meditation since adolescence, but never really practiced it in a consistent way. I'm 32 now and about a month ago I decided to give it a more serious effort.
I've been following the instructions on the book "Mindfulness in plain english" and I'm currently reading "Beyong mindfulness in plain english", both by Henepola Gunaratana. Plus some other things from different sources.
I've experimented a little bit, trying closed vs open eyes, concentration + mindfulness vs only mindfulness, seating vs walking, etc and I've got to a combination I'm confortable with:
a. "Formal sessions", currently about 45min on the good days, seating, closed eyes, mindfulness + concentration on sensation of breath in my nose
b. Attemp to keep mindfulness on many tasks during the day, including walking on my way to places
I find mindfulness comes easier to me than concentration, so I try to balance it so I practice both accordingly. In a sense the practice is getting easier, I'm able to do a whole 45min session without too much trouble.
On the other hand, there's and inversion in difficulty. On the beginning of the session my mind is usually not that agitated, being kinda easy to focus on the breath and sustain it. But as I get further - I don't know if "deeper" is the right word here - some problems start to occur.
First, the sensation of breath start to fade out until it becomes very hard to find it and therefore to focus on it. If I try to reconnect to the physical sensasion, I come back to a "shallow" state - again, maybe "shallow" is not the best word.
Second, as I lose my object of focus, my mind starts to get more agitated. While I start with little "noise", mostly background thoughts, it begins to become more "loud" and sometimes thoughts begin to "avalanche".
At this point, if I try too hard to find my breath without coming back to the "surface", I start getting stressed out.
Another thing I tried is to let go of the focus and use only the mindfulness. This ways I get to keep my calm but then I start either to get plunged into the thoughts much more easily than normally - even during the day -, or I start to phase out and sometimes sleep.
My most recent attemp was to focus on an empty "spacial" point - not related to the breath - only to have something to anchor to, while leaving the rest to mindfulness. That seemed to work a little better, but still problematic and unstable.
I'm sorry for writing so much, but now the really short summary question

What should I try at this point?
Thank you,
Rodrigo