Dear Jen,

Write down what you need to say to the clinic on the phone:
1. on a diuretic (name of drug) but can't keep any liquids or food down.
2. have nausea -- not able to keep down food or water.
3. have been dealing with this since ______ (this many days).

If I mis-characterized your situation I'm sorry, but you get the idea. Write down what you need to say before you make the phone call. Take this one step at a time.

I think that given the right information and given your insistence on being heard, they can help you.

You don't know if this is serious or not. You do know that this is serious enough to be treated.

Don't worry about what could be wrong. Only worry about making sure that you articulate what you need to say.
I feel that once doctors have given us medications, those doctors (or their representatives) are responsible for making sure that those medications are helping.

M.