Dress loose around hips

My dress is a mermaid style and I had my last fitting yesterday. Everything seemed great, brought it home and put it back on to figure out my boob situation. While it was on I noticed it’s a little loose in my hips. It almost bunches up a bit while standing. I know it can’t be super tight so I’m able to sit but I’m wondering if it’s too loose. I was contemplating calling the seamstress to see if I could come back and we can talk through it. Or if I’m just over analyzing it.
My sister said she didn’t even notice it but of course I notice it very much.
thoughts?