I'm not sure if what I have is a tooth ache?!

I went to the dentist because my right side of my mouth around my teeth was hurting on and off for 2 days. She did ex rays on all of my teeth on that side and saw nothing. My upper right tooth was a little dark on the ex ray, which could be a bone or infection possibly, but she said it would be a guessing game if I couldn't pin point exactly where the pain was coming from. I also have an upper tooth that was done two years earlier and was close to the root. She says the ex rays show that its fine and no sign of decay towards the root. She says I might have an infection in my sinuses, but I am having this for four days now and I cant figure out what tooth it is. She knocked on my teeth, did a cold test and I didn't react to any of it. She said that if a nerve was exposed and she did that, I would have hit the ceiling in pain. It feels like a nerve to me, because I had infected teeth that were pulled out in the past. They caused severe pain in my ears and jaw. I wonder if anyone has an idea, because if I cant find the exact spot, I have to wait it out longer. It comes and goes and seems to be brought on by a lot of movement to my jaw or 5 or so minutes after a eat something crunchy like a cracker or cookie or something like that. Any ideas.? I hope I gave enough details. Thanks.Health Question & Answer

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