Hey, sorry if I am asking this question in a dumb way since I am a novice user but after I upgraded to 18.04 my sound is defaulting to my USB headphones (which I use for work to make calls) and I have to use pavucontrol to set each application to the correct device but this does not save at all and if the audio stops for a minute this change is lost and I have to manually keep switching the application back to the other device.

I am at wits end with it. Any advice? If you need logs/diagnostics please tell what commands and where to look. As I said, I am very new.