The key here is that if there is something that requires further evaluation, the pain will persist. If it does not resolve in 10 days, you may need more high resolution imaging.
The tissues may be sensitive to the harsh reagents but I would recommend that you see your surgeon to double check.
You should see your otolaryngologist- There are many possibilities ranging from a lingering sinus infection to viral mediated anosmia. An office evaluation will usually help to determine the underlying cause.
It depends on your calcium levels- You should see your doctor to have your calcium evaluated.
This may be complex, yet most likely, there is a rather simple explanation. You would be best served by seeing someone whose practice is dedicated to swallowing disorders. This is commonly found at major academic institutions. A careful history and exam will usually determine the cause- Often, it is nothing serious.