It might be that the socket needs to be rinsed out. There might be food particles or tooth/ bone pieces left over that cause a chronic irritation. Sometimes it needs to be rinsed out more than once before the infection clears up-even with antibiotics. If you rinsed too violently, the blood clot could also have become dislodged, which could lead to this problem, i.e dry socket.
Arrange a follow-up visit with your dentist.
During this follow-up visit, the dentist can also take x-rays of the adjacent teeth, to examine their status.