Could be the dreaded dry socket causing pain. Deffo go back to the dentist and get it checked and packed
HI,
Swelling, pain and inflammation can occur with removal of teeth. Drainage of pus, antibiotics and painkillers will help. Also application of ice packs will help. Healing ill take some time and you need to wait till then. Follow up with your dentist. Hope this helps.
The answer is based on information provided. Exact advice is not possible without a proper examination and investigations. You are requested to consult your Doctor. Take care and keep us posted.