What's up with me and chewing?

So earlier today I was having lunch, i noticed that when i bite down really hard (i mean REALLY) the left side of my face; i think under my cheek bone on the hollow bit, i could feel pain there but i couldn't really figure out where exactly it was coming from. The pain wasn't excruciating but it was a sort of ache, i told my brother about it straight after feeling the pain, and he told me not to keep chewing hard on the left side- so i didn't and it went away after about 1 minute(not exaggerating). So it went...and later i was having dinner and i felt it again; it also went away about 1 minute upon feeling it. Weird? Can you guys help me out?