I have had a few teeth pulled. Usually, the only thing that happens is that it will hurt a bit. I normally take one ibuprofen before the shot wears off, and it reduces the pain to a tolerable level (I don't want it totally dead since I want to be reminded not to be too strenuous until the bleeding stops and it stabilizes). I have had a few abscesses, usually lasting about a week and a half. Pain stops soon after they burst on the 3rd or 4th day.
There are two possibilities. You could be infected and the antibiotic is not working (it happens if the infection is resistant). Or, the dentist could have done a dubber's job in removing the whole tooth or could have caused other damage in the socket. With a wisdom tooth, it is easier to do that because of poor clearance (other teeth are easier to extract). In case it is a resistant infection, I recommend astragalus (an herb) and coconut oil (which can help the immune system and destroy bacteria that are causing the infection). And, I strongly recommend a quality acidophilus supplement or yogurt with live cultures (preferably organic) while you are taking the antibiotic, to prevent candida problems.
If the problem is due to physical damage in the socket, you will probably have to suffer a while longer as the body repairs it. I would recommend going to another dentist, if for no other reason than to document that the first dentist did a pxxx poor job (it sounds tacky when they want to reuse gloves). You may be in for a malpractice suit.