Is this 'bag' swollen and warm? Any other swelling around the eye, or red areas?
Any fever? Any visual disturbance?
Do you wear contact lenses?
Thank you for the extra information.
The muscles that operate the blinking process are a combination of the circular muscles around the eye and the ones that control the eyelid. I would be worried about possible infection, specifically cellulitis so I would recommend that you get this looked at. If the problem felt like grit when you blinked then you might have either a corneal abrasion or a particle under the eyelid.
Your sight is very fragile so I would have this checked out, if needs be go to ER if there is no local doctor that will see you as a temporary resident,