As I started to get more experienced (also software development) I noticed that more and more people were seeking out my help - which was frustrating, because I had goals I was supposed to be working toward myself. I found that keeping a log of each interruption and how long I spent on it eased my anxiety quite a bit: although I've never actually been asked to justify why it took "so long" to complete a task, having that documentation handy just in case made me a lot more pleasant to work with.