I am so sorry to hear that you are in pain. I hope that by now you had seen a dentist. Sometimes when root canal treatment is performed and the tooth is sealed, gasses can build up in the tooth and they cause the pain. The tooth has to be "opened up" so that the pressure releases. Without looking at you, this is all that I can give you.
Taking ibuprofen (Motrin) and acetaminophen (Tylenol) together (two tabs each) works well.
I personally have never heard of wisdom teeth causing dizziness, but stranger things have happened. It is impossible to diagnose you over this limited forum. I recommend that you go to your dentist or oral surgeon and have the teeth looked at. Only with an X-ray and and examination, can one give you a proper opinion. Chances are that the teeth have nothing to do with it. A good check up will not hurt.
One with the bite, and the other with the root canal. It is very possible that not all the canals were sealed during the procedure. The only way to check for that is with Cone Beam CT which allows one to see the roots in a three dimensional view. The bite could be fine in a vertical direction, but when you move your teeth they hit.
Have your dentist check the bite at you move your lower jaw and make sure that the tooth is not hitting the other teeth improperly.
If your dentists cannot get an answer, you might want to go to a Prosthodontist for a second opinion. www.gotoapro.org will have a link to a specialist near you.
I am so sorry to hear about your troubles. My first piece of advise is to DO NOTHING until you have a diagnosis.
I have seen situations such as yours... the teeth get root canalled, extracted and the pain is still there.
Ask your oral surgeon to have a Cone-Beam CT scan. It will allow your doctors to view the area in a three dimensional fashion. It is possible to see the independent roots of each tooth still present and the internal aspect of the sinus, which could also be the cause for the pain. In addition, a consultation with a neurologist is in order.
There are other things that can cause pain in the area. All these things have to be ruled out before we look at the teeth. The teeth might have nothing to do with it.
This is the best that I can give you. You must establish a diagnosis first.
I am so, so, sorry to hear that you are having this problem. A major portion of my practice is dedicated to people, like you, who had major dentistry done and are struggling with "bite issues". The specialist in this area is the Prosthodontist. You can locate one near you at www.gotoapro.org and go in for a consultation.
Unfortunately, this is all that I can give you over this very limited forum.
The Prosthodontist has to examine you and check your bite carefully. It might just be adjusted, or some, or all the restorations have to be redone.
No. It is NOT normal shape for fillings. Ideally the restoration should be identical to the original shape of the tooth. However, that is difficult to achieve with a direct restoration (a filling).
You MUST go back to the dentist to address these problems. The new fillings should be just "there", as if nothing was done. The bite should be right on and your tongue should not be able to detect the interface between the filling material and the natural tooth. These characteristics are highly dependent on the dentist's ability. I hope that you can resolve the issues with your dentist.