Thank you for your query,
Is the swelling is moving with the action of swallowing?
If yes it could be a Thyroglossal cyst
which needs excision of the cyst.
Some times it is attached to a bone called hyoid bone
So CT Scan
may be required to know the attachments of the cyst.
Nithing to scary about this problem.
Consult your ENT Surgeon and follow his advise.
Hope I have answered your query.