Changing Room vs Fitting Room vs Dressing Room: What's the Difference? Confusing English Words

Guest bedroom makeover, part 1. I’ve literally been on a bedroom decorating mission recently. This is one of 4 I’ve decorated in 3 weeks! This one is my guest bedroom, the other 3 are at my daughter’s, she’s moving house! And the best bit of all…it’s only a 5 minute walk from me, literally round the corner 😍🥰♥️ Like us, she has 4 bedrooms, so I’m a woman on a mission trying to get all the bedrooms decorated before they move in. I did hope to have my guest room completely finished before she go