Hi Bob, firstly apologies for the late reply, I had some tech issues.
I currently breathe only on my left and every other stroke. I think you may be right about trying to raise my head to breathe.
I don't think we did sweet spot in the Effortless Endurance course I did recently but I have looked online and tried and I don't think I have a problem breathing in that position.
I have found a series of three TI videos about breathing, specifically rolling to breathe, leading with the hip and not reaching to breathe, which look very helpful: 'Total Immersion Coach Greg - Roll To Breathe' https://www.youtube.com/watch?v=pYFA3RNUtL4
I'm going to try concentrating on rolling to breathe and not reaching to breathe. It sounds great in theory, but we'll see..!