I am using the external filament port.

So, I was changing filament colors, and I could feel something was wrong. The filament didn't feel like it was "catching" into the extruder port. I finally got it, but it wouldn't extrude right. It was barely extruding at all, and would often just get stuck and slowly extrude a blob rather than a line.

I opened it up, and the extruder gear seemed like it was pushed in a bit, too far in to actually grip the filament. I pressed on it to see if it was loose and it completely went inside, flush flat with the casing around it!

So I tried to pull it back out with tweezers, it seemed to work, it’s fully extended now and actually seemed to lock into some position since it won't push back in... but now it won't extrude at all and the extruder gear isn't spinning.