Is it possible that she swallowed some shampoo since she started vomiting after you gave her a bath?   
Was she coughing at all before?  What does her stool look like?   
Look at her gums.  Are they pink or any other dark color?  If her gums are not pink, it can be a sign of something more serious than swallowing shampoo.   
Pinch her skin on the back.  If it comes right back, she is hydrated, if the skin stays raised from the bones, she needs to be given liquids soon.     |