Lateral Incisor pain when pushed on

[Kevin Zhao]

Hello, I got a root canal finished on Monday night (11/28) and a permanent filling but not a crown. It was on my first top left molar. Yesterday, my top left lateral Incisor started aching when I pushed on it in any direction, and when i bit down on hard food with it. I researched this issue, and found it could have to do with my sinuses. My nostrils were a bit stuffy that day. Any ideas on what might be the problem? Thanks.