I have been a music writer for nearly thirty years, and I still will do anything rather than getting down to actually writing?
Why? Because it's hard work!
So, I am often in your situation - i have a writing task to do, and i am wasting time not doing it, and while i do that, it hangs around just below my concious mind, affecting everything and making me more and more miserable.
It's a vicious circle, so you have to just break it - and believe me, when yyou do, you will feel a lot better, and euphoric when it's done! Not for nothing did famous writer Dorothy Parker say "I don't like writing, I like having written ..." because that is exactly how it feels.
You will feel that because you have delayed, you are somehow less capable of getting started. This is an illusion. Sit down, take a deep breath, and start. Thinking about starting is worse than starting, so once you get going, you will find yourself able to carry on, finish, and feel wonderful.
I am off to take my own advice and write up my interview with the drummer from Florence And The Machine!