Another Tooth Ache? Please Help!!!?

Oh boy. Here I go again. A year ago I went to the dentist to start a series of work. I had 2 root canals done and 1 crown. I am not having sensitivity in a tooth that I am suppose to get worked on in November. Here's the problem, the tooth that is bothering me now is between one that needs a crown and one that needs to be pulled. I have a wisdom coming in that will be pulled, so the tooth between that molar and another is sensitive. In the xrays we took (1 yr ago) it just needed a filling. I will of course need new xrays I am sure,... anyway, the tooth is now sensitive to cold and when I get the blood pumping I have a slight throb. I am now worried to death I will need yet another root canal. Is it certain that because it is slightly throbbing and it is sensitive to cold that it needs a root canal? I am also concerned that the wisdom, growing in may have cracked that tooth a little. The wisdom is coming in streight but there isn't alot of room for it. Any dentists or RDA's? Help!

Another Tooth Ache? Please Help!!!?
Spontaneous throbbing will need root canal. Cold sensitivity and then throbs and throbbing stops almost immediately, might just need a filling. Wisdom teeth rarely crack teeth, but can cause a cavity if pushing up against a tooth.
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