I've noticed that my mood and pain levels are intertwined. If I'm stressed out or something emotional happens soon after (not as quickly as yours seems to be, however) my pain level will go up. It also happens in reverse: if I have a particularly painful day/moment, my mood drops without any other event to explain it.
I've taken to trying to track my pain and moods as a way to be mindful of what the origins of how I'm feeling are. It's something I learned while I was participating in Dialectical Behavioral Therapy.