Thank you for your query at DoctorSpring.com
It is not very clear from the image that it could be a dry socket.
However if you are experiencing severe pain better to consult your dentist again and take a stronger course of antibiotics and pain killer tablets for 2 to 3 days more.
If are a chronic smoker better to stop smoking .
If diabetic then get a blood investigation done to check sugar levels.
Usually, the dentist may irrigate the area with povidone iodine or iodoform solution and it should heal asypmptomatically.
Hope this was helpful,
Feel free to discuss further.