purjo, it sounds to me like your thinking too much.

Just try and totally immerse yourself into the meditations. Follow Master Lin's lead. Try to fully experience the meditations, not direct them. Have faith they will take you where you need to go.
Let your Master's and the universe's energy do the driving, and you can just enjoy the journey.
As for breathing, I have caught myself checking my own breathing at times. Some of those times when I have been deeply relaxed I didn't think I was breathing. I knew I was but I didn't think my chest or stomach were moving at all.
I wasn't concerned, I was more amazed. I was fully confident I was getting what I needed. Either I was breathing so smoothly I couldn't consciously notice the movement, or something else.
Start your meditations consciously, but then release control and trust in your Master and the universe and go as completely into the meditation as you can.
You are perfection.
Iam2 