Hello Werner and coach Bob, thanks for your comments.
I breath every 2nd stroke, left side. I try to exhale continuously through the stroke with a final push to empty as I surface, and I follow my shoulder so I do get an early breath, such that my head is in a down position before I spear. This feels good and i do get a good length per stroke. That's how it "feels" to me anyway.
I'm not worried about getting air, it's always there left side (am working on bilateral also) but I do think I have tension.
I think I need to:
1. focus on discovering where tension is creeping in, and
2. pushing through the discomfort.
Any other points to consider?