Hi Nancy!
My breathing definitely changes when I get into a really expanded state, but I don't get the sense of forgetting to breathe - it's just a slowing down of the rhythm. Have you experimented with the breathing techniques in the manual?

Unless this is uncomfortable, I would just observe it and let it be what it is. If it is challenging for you, we could do a mini session together to see what is going on and experiment with what would shift the experience for you.

All the best!
Wendy