Please HELP!! PLEASE!

Hi everyone,
I am heartbroken right now. My favorite chick 1.5 week old, and a silver laced wayandotte is acting very strange. Before (since 3 days ago), she has always been chirping really loudly. Every other chicks is perfectly content with the brooder, but it is only her that chirps 24/7. Her chirps don't sound like the chirps of her friends, which sound like happy chirps. Her's sounds more destressed. I'm so scared right now because she is sometimes rocking back and forth, she doesn't use her wings for balance much (it looks awkward but not broken), and currently, she is having trouble standing up. She may be too tired because she sometimes falls down and sits down. Two things happened to her, one, our dog touched her with his paw (but this didn't hurt her at least not visibly, but she may be traumatized by the experience), and two, once when I changed the food, she was standing on it and I accidently flipped her over and it took a long time for her to get back up. Also right now, she is usually all alone and chirping. At first, we thought that she might've just missed her family but now I can tell something is wrong. I don't think that she has poopy butt, but I'm scared to pick her up and check because she appears so weak. I can't really tell if shes eating or drinking. I saw that she was just standing though. And it might've taken some strength for her to just stand. Please help me. I don't know what else to do. I can't stand to see her suffer, and I can't live with myself if she dies. I'm so scared. Might this be just a stage? WHAT IS GOING ON?? HOW CAN I HELP HER?? I doubt it because this has happened ever since. Well I'm pretty sure that she was healthy when we got her. She is so precious. What if my dog really hurt her?? She doesn't look hurt...