Re: plugged duct or worse?
The fact that the bump seems to disappear after you nurse points to a plugged duct. Not a bad plug, because those are so blocked that they can't shrink much. I wouldn't worry about it unless it suddenly stops draining/shrinking.
Regarding the OB issue- since you're in a new town, I encourage you to look into midwifery care as an option. I really prefer midwifery care. The standard of care is just as high as with an ob, but the approach is totally different. Much more compassionate, much more focused on keeping you well instead of fixing you when you're sick.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"