I am sorry your baby is not feeling well.
Shaking is sign or pain or nausea.
Feel all over her body and look in her mouth for any pain response, stuck item or abnormalities..
Put a few drops of pancake syrup on her tongue to raise her blood sugar in case she is a bit hypoglycemic. That should perk her up.
Add unflavored pedialyte to her water 50/50 to hydrate her and balance her electrolytes.
Try offering her a small amount of boiled chicken with all fat drained off, chop meat , or baby food with no onion, beef, turkey, etc
Also give her one teaspoon a day of plain yogurt to keep "good" bacteria in her system.
If she develops any abdominal pain, bloating, constipation or cannot keep anything down she needs to be seen by a vet.
Please let me know how she is doing. I will always be here for you
I hope your baby feels better very soon..
Best wishes for her,