At the time these symptoms came on, my breathing was normal. As the symptoms began I started feel the urge to take big deep breaths but couldn't - I wouldn't describe this as hyperventilating, since my breaths were not shallow and rapid -- they were shallow, infrequent and sporadic.

I realize I was still having residual effects from the tetany symptoms this morning, but now they are beginning to wear off.

I have just been trying to prepare some lunch. I become very breathless on standing/moving and my chest feels terrible even sitting still. It is as if I forget to breathe on every breath and have to remind myself to take another one. It feels more effort to breathe than not to breath, as my body feels like doing. I feel faint and very confused, I can't think straight.

Surely if my symptoms were cause by breathing issues, I would be experiencing tetany now, as a consequence of increased difficulty breathing, rather than after the tetany symptoms have began to subside?