Good day,
A dry socket usually appears after days 3-4 post extraction and can become very painful.
But judging from your photo, it is also possible that the pain can be originating from one of the adjacent teeth to the socket. They look extremely carious. Just because they weren't painful before, doesn't mean you can't get a flare up at any stage.
I would make a follow up visit with your dentist, to have these teeth checked out as well.
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