A&E with HG when you can keep fluids down just fine is unnecessary. Speaking from bitter, bitter experience, A&E is for when you're bad enough to need intervention
Sorry stratters but someone with sever HG whose had it a fair few times or for a significant length of time or has a very very quick slide from hydrated and normal to dehydrated should apsolutly go to A&E if they are unfortunate enough to not have a Consultant with enough knowledge to instigate a decent care plan or a GP/OOH willing to treat it before it gets dangerious.
A lot of women who are considered sever or have quick slides down need to access drugs that a huge amount of GP's are unwilling to prescribe without the say so of a consultant or need various combos of injections in order to avoid serious damage often the type of damage that can occur before you realise it or before any medical practitioner realises it and often before a drip admittance.
It can make the difference between needing a significant intervention admitance and not needing any admitance at all.
Unfortunately in reality what happens when you use other services like say a drop in is you encounter a doc who is unwilling to prescribe or administer any treatment at all but is willing to ambulance you to the nearest day assesment unit this can waste about 7 hours and still you are not any closer to finding someone to treat you.
Without a care plan or a seriously well briefed and understanding GP it can be almost impossible to see your own GP quickly enough to get the fairly low level treatment that can in many woman halt a full blown really bad attack,
Without someone in a day assesment unit who is aware of you or has the foresight to read and understand your notes you can again suffer a massive delay.
This tends not to happen in A&E because to be quite frank the first course of action for someone who is a bit green and can't stop heaving despite being able to keep down some liquids is usually flaming obvious and can be done by the triage nurse.
From someone whose gone from sat there heaving but able to sip diet coke, no keytones but nitrates and white blood cells, not looking to hot but able to verbalise what I needed to unconscious on the floor bleeding out of my mouth and arse needing admittance to HDU in less than 3 hours and way more times than once.
On all bar one occasion several HCP's involved in my care have confirmed that a simple injection combo would have prevented the issue.