My pump is turned sideways, which is why I couldn't find the deflate button.
The swelling has finally subsided enough that I can stand to squeeze. When I pushed the deflate button I felt and heard a little vibration, and my dick started deflating from it's 40% or so state.
Next, I managed to squeeze the pump hard enough to feel a little pop, but I could only get 2 or 3 partial pumps before it again got rock-hard. (The pump, that is.)
Should I try the hard quick squeeze to see if the valve is not fully resetting? I'm a little afraid the bulb will slip from between my fingers and I'll crush a testicle.

Anyway, I just wanted to share this. Hope things are getting better from here on out.