I really like it on you! Please keep! I have the exact same fit issue with the one I bought, but it's not a deal-breaker. It just means it's a little roomy in the top, which yes, does help for bathroom breaks.
I have not worn mine out yet -- I started to wear it one day and felt a bit shy for it somehow. I'm wondering if there was a skinny mirror in the store because I felt like it emphasized my hips more in the mirror at home than what I remembered in store. I might have to post again to see if my eyes are playing tricks on me.