I think the colors work. I like the green. It’s just not super girly. Idk if you care.
Maybe try white curtains and add some glam accents.
Crystals would look good in here. Maybe crystal light.

Looks fine to me, but I may not be seeing the colors as you do in your space.

If you think the carpet is too dark, I don't see you have many options other than new carpet and that would be wasteful. Once the furniture and accessories are installed I doubt you will pay much attention to the carpet. It's just your focus right now.

Because the carpet is so dark I do think you should paint the walls a lighter color. You can do a lighter gray, or a simple white which is always nice. Try Benjamin Moore Classic Gray or Benjamin Moore Chantilly Lace.

Try white or pinker curtains

I agree with Kara that a lighter wall color would work out better. I would try Benjamin Moore Classic Gray.

I think dark colors are nice in a baby’s room. Feels more snug and secure, may encourage them to sleep more.

I think it isn't as bad as you might think once you get everything in place. That said if it still bothers you, paint the walls a bit truer lighter grey or white.
On a side note, the curtains are too short, they really should go to the floor. I don't mind the pink so much, but it also pulls more yellow pink, than blue pink, which adds another layer of confusion between the greys. Maybe also try a new pink curtain option.
Congrats and enjoy every moment with your sweet little girl!

thanks everyone, my husband is gonna hate me, but i think im going to repaint. i only buy sherwin williams paint so any suggestions? im kinda thinking white since i want the hallway to be white too.

White is a good color for a kid's room until they are old enough to ask for it to be painted ORANGE like my son did. LOL.

Plus, if it's going to bother you, it's easier to do it now before she's all settled in there.

White paint is always safe. Good idea. (I’m not a fan of dark and drear rooms.)

Alabaster by Sherwin Williams would look really nice. — “Alabaster creates an atmosphere of ease and contentment for many spaces. The powerful color sets the tone for healing, rest and meditation in a bedroom or nursery.”

I would leave for now, and just add a lot of girly accessories and jazz it up a bit. Give it a bit of sparkle. I love the carpet color, and think for a childs room, you picked a great color. The walls could be a bit lighter, but, since they are all done, I would just accessorize it like a childs room.