Here's an update on Annabelle:
We came home from church and Annabelle STILL hadn't pooped (this was about 11:15). So I freaked out and my dad told me to call and see if I could find a vet. While I was on hold, we got Annabelle out and put her in her pool. As the person at the vet was telling me they didn't see chinchillas, Annabelle began pooping. She pooped probably 20-30 times in like 25 minutes, so not too bad. She also dusted, which is something she wouldn't do earlier today. When I put her back into her cage, she didn't poop, but I'm hopeful she will while I'm sleeping. She's currently in her hammock, laying down and looking at me through squinted eyes and she has her ears back (her normal look when I put her up from playtime). Her tummy feels like the right kind of squishy, so hopefully everything will be alright in the morning. My dad thinks I should maybe still take her to the vet just as a precaution, which I am for, partially because I've been wanting to take her for just a checkup anyway. Thanks for your input everyone, and I will update you again in the morning!