Brief background.
I have no insurance.
I went to the dentist for the first time in 3 years.
2 deep cavities.
Paid $500 for 2 fillings the other day.
The dentist told me (when I was still on local anestestic) that I wasnt "out of the woods" and if I felt any pain to call him to schedule a root canal.

I dont think so. Cant afford it. Well after the anestestic wore off I was fine, no pain. Today im driving to work and I get these 2 burst of pain, like someone hooked electricity up to the tooth and tried to jump start it. A single throb, not very painful, but very unnerving (no pun intended) and very uncomfortable. The rest of the day went on and it happend twice more, I mean two short burst spaced a couple hours a part, lasting no more than a split second. I can eat fine, its seems to be random.

What should I do? Is this normal? I dont feel like calling the dentist and getting an I told you so come in for a root canal answer, especially when he could have saved me the money in the first place and just done the canal. I am very worried and angry at the same time.Thanks in advance for any input.