Hi,
Thanks for posting your query.
Pain during swallowing definitely indicates some sort of hindrance inside your throat.
Pain on left side of collar bone may be due to inflamed
thyroid gland.
You should consult with internal medicine specialist and should go for thorough check up.
There may be possibility of throat discomfort due to recurrent
acid reflux but still it will never cause pain at left collar bone.
You should take anti-inflammatory,
proton pump inhibitors and antibiotics for faster recovery.
You should also go for
endoscopy.
Take care,
Dr. Mayank Bhargava