Good morning, how's little Lea today?
Can you answer some questions, it will help us see how she is doing.
How often is she left alone in your room, and for how long?
Does she have a box fort of some kind for hiding in? If not, do get a box for her and line it with a shirt you have worn.
Is she eating well? Kittens eat a lot, she should be eating at least 9 ounces of canned food a day. You can get the kitten versions of canned foods if you feel more comfortable doing that, but it doesn't really make much difference I don't think.
Was she spayed before you brought her home from the vet?
Do you have scratching posts for her? It is important to give her something to scratch on right away. This will prevent problems with scratching furniture as she gets older and bigger. Once she is roaming the whole house you will want scratching furniture for her in every room.
Right now you can give her one of those little posts if you want, but cats need tall sturdy pieces, or curved, or horizontal. Most cats prefer a variety, and there are plenty to choose from.
Cardboard and sisal are the most effective and popular with cats.
Has she been to the vet for a check up and to start her kitten series of shots? I am not a fan of over vaccinating, but she does need her core vaccines. And you will need to talk to the vet about her spay, if she isn't already done. Some shelters do those early spays before releasing kittens, but many vets, for some reason, don't like to spay before 6 months. I think 4 months is better. Get her done before she has even one heat cycle.
I think someone already posted the catinfo.org link. to help you understand the kind of food Lea needs to thrive.
Here are a couple other links.
www.kittyshark.netwww.catcentric.orgThat snuggle toy Dee linked to is adorable. Or you can get a wind up alarm clock (the kind that ticks) and wrap it in a soft blanket and put it in her bed. A bottle with warm water in it will help too.
She's so tiny and used to having other kittens around her, she may be cold. Make sure she has a warm snuggley bed to burrow in, until she gets brave enough to snuggle with you!
Please don't ignore her. Don't force yourself on her, but that doesn't mean ignoring. You want to sit quietly and talk to her, so she knows your voice.
Remember, patience patience patience! She is just a tiny baby suddenly finding herself in a huge scary unfamiliar place.