I'm thinking about going into the bathroom at work to hide.
Why do you want to hide?
I just need some privacy.
Oh, so it's not an emergency? If that's not the case, you shouldn't just go hide in the bathroom to avoid working. If you do that, people will view you as lazy and it could cause issues for you at your job.
I'm going to do it anyway.
Everyone needs breaks from work during the day, but if you regularly just go hide in the bathroom, people will catch on eventually. Instead of hiding in the bathroom, why not work until the next time you're ready to take a normal break? That way you don't need to worry about being viewed as lazy or incompetent.