It sounds like the vet gave her subcutaneous fluids (fluids under the skin) which is good.
Putting her in a bath is not something you should be doing with a chameleon. They won't drink that way and they certainly can't absorb water through their skin. If you are giving meds orally, just add some water to the meds. I put the end of the (needle-less) syringe deep in their throat, well back of the airway openings which they can pull to the back of their throat. Just be very careful not to do any damage to the throat structures.
Sometimes I forget people are in a complete panic and very upset. Again, I'm sorry if I've added to your grief.