From your description, it sounds like Herma may have a fever due to infection (this is causing the chills/shivering) and because she's not spayed, she is more prone to develop a serious uterine infection called pyometra. Here is more information:
Even if you don't see any discharge from the vulva, she could have 'closed' pyometra and her belly may be distended due to the fluid and pus inside her uterus.
If she is not eating, and cries when you try to touch her, she is in pain. If this condition is not caused by pyometra, it can be caused by another type of infection (viral or bacterial) anywhere else in her system, plus, she may have an oral/dental problem, prohibiting her from eating, because it hurts. In the state she's in right now, I don't think you'll be able to open her mouth to inspect it, but when she cries, try to glimpse the color of her gums. If they are not light pink, as they should be, and are paler than usual, like white-ish, this indicates a serious issue is going on in her body and together with all the other symptoms, Herma will need to be seen in person by a vet, immediately.
If your vet doesn't have emergency hours, bring her to the nearest ER vet center, now, so you can get a definite diagnosis and treatment, so she's feeling better. As you read at the link I sent you, typically, the only cure for pyometra is to have her spayed.
I hope all will be well with Herma and please let me know how she's doing and what the vet's findings are. Thank you!
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