I’ve wondered also whether some of the sounds I’m hearing relate to heartbeat. I have concluded I don’t think they do, because I seem to have some ability to change the pace of these patterns and even, occasionally, to silence them with conscious breathing and relaxation efforts. I am starting to conclude that what I’m experiencing may relate to anxiety. I’ve been caught up in a particularly difficult move in the past few months, and that’s when this all started for me.

I agree with your statement about waking up to these patterns in the morning. That is particularly disconcerting.