Help please!

Why did I love my baby girls name while I was pregnant (hence deciding on the name) but after I had her, about 2 weeks later, I began to dislike her name! I just dont get how I went from thinking its adorable and cute to thinking its so plain. I hate myself for naming her that name now! I am 5 months PP and I still wish I would have named her something else. What do I do to get over this? I cant change it cause people will think I’m crazy 😢