Your descriptions appear to suggest a benign soft tissue neoplasm.If it provokes electric, shooting , or burning pain, traumatic neuroma or benign nerve sheath tumor are likely differential diagnosis. Seeing an oral surgeon is advised.
A lot depends on how long you've had it. If only a few days, try coating it with milk of magnesia to make eating easier and keep food and drink from irritating it. Also, do what SassieLassie suggests, after 7-10 days, if no better see your dentist.
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