My best friend had this dilemma - she'd had a lovely, long-adored name chosen for a daughter since she was a teenager. In the last weeks of her pregnancy, another name (equally lovely!) occurred to her.
I didn't tell her what to do, but my years of hanging out on baby name boards (I've been name obsessed since I was a young teenager) have led me to believe that name regret is normally down to one of two situations:
a) the mother feels pressured - by the father, or other family - to choose a name she doesn't love for her baby, normally when she's hormonal or unwell after birth, and regrets agreeing to it later.
b) she has her head turned by a shiny new name in the late stages of pregnancy, chooses it but later feels the baby suits her previous choice better.
I think the latter happens because let's face it, names are so fun and there are so many great ones out there, and once we've lived with a choice (even in our heads, not on a baby yet) for awhile it can seem less exciting.
So I'd urge you to really think about it, imagine yourself a few years down the line - which one feels most like your daughter? (Personally, I resisted temptation and went with my longtime favourite and have never once regretted it. Same for my friend!)
That all said, I love the name Hazel. 😅