Help for my baby girl!

I have a 3 year old baby girl named Lucy that has very suddenly become so sick! Earlier today she was up and about, running in her wheel and everything and tonight she is dragging her back legs and barely even moving! I did notice yesterday that she still had food from the night before in her dish and that is very unlike her, but I figured it was just one night and she would catch up tonight. However, I just tried to give her mealworms and she won't eat them! Lucy NEVER turns down mealworms! I had also noticed that she was losing a little bit of weight lately, but this is typical of her because of how active she is! Sometimes I literally have to take her wheel away because she will run soooo much!



She has never acted like this before and I am super scared! She's breathing super hard and is just lying on my bed :( If anyone knows what I can possibly do to help her out I would greatly appreciate it!