Sick 6.5 yr old dog

[Amberr]

My dog recently was put on anti-inflammatories for a suspected fall, after being on them for a few days she began throwing up, the vet said to take her off the medication as throwing up was a side effect. she has been off them for a few days now, but is not eating at all and is drinking hardly anything and is shaking, she's weak and is lethargic. We are giving her maple syrup right now to keep her blood sugar up,but I need suggestions on what could be wrong and what to do . I cant get her to the vet right now, but am going to as soon as possible.

(she is a ****zu/poodle)

What could it be?
What would be some things to give her to coax her to eat?

Thank you