1) Short summary of what’s likely happening

After a recent filling, mild sensitivity for a few days is common, especially to hot, cold or pressure. But the combination you describe — pain when drinking (likely thermal or fluid pressure) and a squeaking/grating feeling during chewing — raises a few possibilities:

Likely causes (ranked by probability)

Immediate observations (zoomed image review)

-A metallic structure is visible on the lower posterior tooth area (looks like a crown/abutment or large restoration).

-The occlusal surfaces of adjacent molars show brown staining and pits consistent with caries (decay).

-The local gum tissue is mildly red and slightly swollen near the affected tooth — a sign of inflammation.