Okay so first of all, hold back on the carrots. Carrots are high in sugar and really should be used more of a treat food than a staple part of the diet. Unlimited timothy hay, and other types of grass hays, should make up the majority of the diet. What type of pellets are you using? Make sure they are just a plain pellet and don't include things like colored bits and seeds.
She's still eating? If she's still eating and acting normal I'd cut her back to eating only fresh hay and water and keep an eye on her. If she stops eating or acts lethargic or off, or if she doesn't use the bathroom in a span of 12 hours or longer, I'd get her into a rabbit experienced vet.
One month old is very young for her to already be in a new home. Baby rabbits should really remain with their mothers for at least 8 weeks, and in some places it's actually illegal now to sell baby rabbits that are less than 8 weeks old. I'd watch her very carefully, you may very well run into some problems due to her being taken from her mother at too young of an age.
Do you have a rabbit experienced vet you can take her too? With her being so young, and now not going to the bathroom normally, I think it might be a good idea for you to get her in for a checkup. Even if it turns out that nothing is wrong, it's always a good idea to take a new pet into the vet to get checked out anyways.
I'm not sure from your post how experienced you are with rabbits but you should check out the House Rabbit Society website. It's just www.rabbit.org
, and is a great place for new owners to research rabbit care.
Good luck! I hope your little one is okay. Keep us updated on her.