Thank you very much for the useful information chris.
The first step here is to rule out any neurological problem that might be giving you these symptoms such as circulation issues to the brain, or inflammatory conditions like multiple sclerosis.
You should see a neurologist for a comprehensive clinical examination and tests (MRI) to be absolutely sure that there is nothing seriously wrong.
Pain on one side of face can occur due to trigeminal neuralgia, but this is not associated with pain and weakness in arm/finger (which can occur due to pinched nerve in spine, but this is not associated with pain at face). A clinical examination and MRI will give the exact answer.
These symptoms can also occur due to anxiety issues, but before attributing this to anxiety we need to rule out potential serious causes.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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