I'm glad to read this. I always slept on my back or tummy and now flip-flop all night trying to get comfy on L or R side. Sleeping on my right side always felt better to me for the reasons you just mentioned. Plus, I thought it was better for your digestion, and also it's more relaxing because it helps to open your left nostril which is more calming to breathe out of ( a yogic thing). But I try to get it equalled out to both sides.