I'm sorry if this would be more suited for the Introduction To Theravada subforum.
I'm a relative beginner. I've been practicing Anapanasati for a few months, and I try to attend a meditation with a Sri Lankan bhikku once a week (metta + anapanasati). Often, while meditating, I seem to be unable to tell whether or not I'm thinking. The space seems to be empty, but I feel like there is more going on than I am aware of. Sorry, it's hard to describe... does anybody know what I'm talking about?
Also, I find it very difficult to breathe unintentionally. I begin to worry if I'm suppressing the breath intentionally, etc