Sharp sensitivity pain after a month.

Hi, I have extracted my right upper wisdom tooth 4 weeks back. I didn't eat anything or chew anything on that side for 3 weeks. I was having only soft foods and didn't chew hard foods even on the other side. I went to the OMFS for a follow-up 2 weeks back. He took x-rays and said the site is healed and everything is fine. I started eating food on the extraction side this week. I started to eat soft foods. I ate some hot food and I immediately I felt sharp, sensitive pain on the extraction side. It was like pinching. It was there for first two or three spoons of hot food. After that , it was normal. I am experiencing this for past 3 days. Is this normal? Or do I need to go back and check? I saw the extraction site and it looks white color. What to do for this sensitivity?  Attaching the pan xray taken in the follow up appointment.