I do not think , that you have an infection from the extraction.
You have all the characteristics of sinus headache.
Infection,from the extraction,has the following important symptoms like:
fever
and abnormal swelling ,around the site of the extraction
Symptoms that you do not have
If the dentist,had noticed infection,when he was packing it,he would have prescribed you antibiotics.
You must not panic, but if the pain continues, you must go to your dentist, who will place a medicated dressing,on the extraction site.
In the meantime, to allow the area ,to heal, you should eat soft foods,soups,liquids, at least the first two days.
