I think waiting is okay. Its hard to predict when it may flare up and worsen. When did the aching start exactly? The day the filling was placed or the day the cement was placed?
The aching has been intermittent since the original composite filling was done 6 weeks ago. The dentist did comment that the decay was quite deep. I don't know the tooth number. It is the fourth bottom tooth from the center. The pain had been further back near the temporary crown. When the permanent crown on thenback molar was put it, I didn't require numbing, but the suction straw was really painful, so they quit using it. A week later, this fourth from the center bottom tooth is extremely sensitive, can't put any pressure on it, feels like it has moved closer to the fifth tooth, my gum is bleeding when I floss, and I have slight swelling directly under that tooth. Advil helps, but doesn't last the entire 6 hours between doses. I don't think my braces 40 years ago caused this much pain!
There's a number of possibilities due to multiple treatments.
The filling could be the problem due to the deep cavity. The nerve could be infected or inflamed and its causing the pain.
It could also be the crown. The bite may be off (resulting in more pressure and pain), there may be some cement stuck somewhere that's irritating the area or it may also be a problem with the nerve.
Unfortunately it could be more than 1 of those things too...