I'm from the UK also
What you first put I actually thought you did have Sjogren's as I've had it a good while and your symptoms are exactly to what I go through day in and day out.
I really hope it's nothing to serious and it can be dealt with properly...pleases update we with your results.Hugs Terry
Diagnosed with MCTD (Mixed connective tissue disease)
Lupus SLE/SCLE/Secondary Sjogren’s syndrome/Raynaud's phenomenon/Scleroderma/psoriasis/
Antiphospholipid Syndrome/Peripheral neuropathy/Pernicious Anaemia/Osteoarthritis/Chronic IBS/
Muscle Atrophy/COPD/Hypothyroidism//Epilepsy/Bipolar-Manic depression-OCD