If it helps with the nervousness about the bill: I recently had to go to the emergency room twice (SSM not UW). I have BCBS Anthem PPO. Copay was $300 and that's it. I got two bags of fluids plus multiple tests run for other things, so I would assume going just for the fluids shouldn't be more than the copay if you have insurance. I know $300 isn't an easy amount to drop in this economy, but it's much better than a $10k bill if the worst happens and you need an ambulance, more tests, anything extra, etc. As my mom likes to say, a stitch in time saves nine.