My tooth is hurting

Well, kinda. Mainly when i have to snuff to keep my nose from leaking all over my soupcatcher. (you're welcome for the visual). but every time I do, my tooth throbs a little.

I've always worried about my teeth like this. I'm nearly 30, and never had a cavity, root canal, bridge work, braces, or what have you. Just a rather strong Tartar problem. So, when one of my teeth begins to ache in the slightest, I grow fearful. I kinda like the notion of keeping all my teeth.

It could also be due to stress, as I tend to clench the jaw when worked up, and i've been on Code Yellow for the past month now.