I had a beardie who did pretty much everything you're describing.
Reading through these posts, I cannot stress enough how important it is to get your beardie on their own in a quiet room, and cover the viv. Yeah, she can't see out, that's the point-- she'll have a quiet, confined space to relax and get to know her viv, so she can get used to her home and be able to relax.
Now, my rescue was an adult, which is a big change from a baby. This is going to sound really weird, but I just wrapped her up in a "security towel", which should be wrapped around her so her back is covered. My Gem seemed more comfortable knowing her back wasn't exposed to the world, and would sit still and not gape or beard or hiss. She seemed to feel shielded. Also, I read to her. Yes, I read to her. I laid her on my chest, and read a book aloud. I talked to her. And I did all of this in a quiet room, with dim lighting, usually in the evening.
Also, if you can sit in that quiet room and shut the door, and let your beardie roam, that would be good. I'm not exactly sure why this made Gem feel good, but she liked being able to run around. I sat and I watched her, and she seemed to realize that I wasn't going to chase her or anything.
Don't get upset about the eating, or rather, lack thereof. Offer fresh salads daily, phoenix worms if you can get them, and try to calm her down. She'll come to her senses and learn you're really trying to help. :wink:
Jacqui