You've done well to even get on the computer I couldn't look at the TV or the computer for months with my first HG pg. You might be able to get fluids without being admitted, just a couple of bags in the emergency department so you won't have to stay in. There are some in home programs for fluids too depending on your state I can't remember if QLD has this or not though.
Have you tried hydrolyte ice blocks? If you can eat them they can help. Coconut water is another one really helpful if you can stomach it.
