Hi Helen,
sorry, late in my reply!
you should get this checked out...sorry I simply can't tell from a distance what is going on with you.
symptoms getting more widespread doesn't necessarily mean the arach is spreading, it is common for anyone with chronic pain to have a sort of 'domino effect' as time goes on, with symptoms starting to affect things like dizziness, sweating, tolerance of bright light, loud noises etc and even how people metabolise sugary foods.
Hope this helps,
Take care
DocSarah