A month ago I had a root canal that took 2 visits. Afterwards there was typical soreness for a few days. Up until now it has been fine, recent development is when i eat something crutchy, or with texture, and I bite down on the food it hurts, but not all of the time?? It feels like the pain/tenderness is on the surface of the crown, it does not feel like it is deep in the tooth. There was a small amount of blood on my floss one time. I do have sensitive teeth and sinus problems with some congestion and a sinus headache but that is subsiding. I plan on contacting the dentist but should I have cause for alarm??