I was changing guitar strings this morning and weirdly, I couldn't tune the D string (was tuned flat even with string-screwknob turned all the way). I've been changing strings on this guitar for 10 years no problem.
I looked online and tried some stuff but couldn't raise the tension enough on the D string. Finally I started turning the Master Tuning Knob but that turned out to be a mistake because now I messed up my guitar even further it seems.
Right now the bottom side of the bridge is protruding way too much (see pic). I tried turning the master knob way up but the bridge started creaking so I turned it back, but I can't even get the other strings to get in tune now (they all tune flat).
Any thoughts? I'm not sure I want to do anything else because it only seemed to make stuff worse. I really hope I didn't mess up my guitar because it is my favorite and I'd hate to have it be cracked or something.
Thoughts comments appreciated.