Ignoring the libellous accusations against local dentists I'm glad you're still alive.
As it's a bank holiday lets try some DIY home diagnosis. First tap your teeth with something blunt like a spoon handle. Tap gently on the biting surface – do the all feel the same in that area or does one feel different?
Next gets tricky. If you can find a sliver of ice or a small ice cube try and hold it on an individual tooth and see what response you get. A normal healhy tooth will feel sudden sharp pain (contrary to what the adverts would have you believe). A tooth where the nerve has died or where it is already root filled (nerve removed) will feel nothing.
If the pain only comes when lying down then it could be a bit of heartburn type pain which can mimic coronary pain, hence the name.
I wouldn't pay much attention to ernie's link above – the reply seemed to be touting for business rather than attempting to provide an evidence based reply. There is some evidence for long term chronic inflammatory disease (like untreated tooth abscess or gum disease) being linked with heart disease and stroke (some of the folks i Newcastle did this) but as far as I know it's not a cause and effect relationship, maybe more just if you get one of these you're likely to get the other.
Hope that helps.