Although it is typically more rare in your age group it sounds like you may be suffering from Temporal Arteritis. This is an inflammation in the artery that runs along your temple. It needs to be diagnosed and treated to prevent any damage from decreased blood flow to the area. Diagnosis is by blood tests for ESR and CRP (markers of inflammation) but the definitive diagnosis is by a biopsy of the artery.
Your doctor may want to start you on steroids and aspirin even before the diagnosis is made to prevent damage and decrease the swelling.
Here is more information:
Another possibility to consider (only after the first one is ruled out) is that you are suffering from TMJ - inflammation in your Jaw joint by your temple. This can be treated with a mouth guard at night to prevent grinding and anti-inflammatories.
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You should start with your primary, or see a rheumatologist.
If you need treatment for temporal arteritis then you will need to take steroids and aspirin regardless of your diabetes and you will have to put a hold on the celebrex in the short term.
I would not take the celebrex and take ibuprofen instead - take it with food and take at least 600mg every 6 hours or so.
You can take the hydrocodone as well if needed, but the anti-inflammatory is what you need.
Good Luck! I hope you feel better!