support here
info here
I too had to be hospitalised with HG (dehydration), and have worked for the second link on the info line. If oyu need a chat or have any specific questions, you can e- mail me on Peaches and cream 04 @ bt internet . com (np spaces), or if you post here I'll keep an eye out.
I had it but milder in my second PG, firtunately my FAB Gp medicated me from my first signs which I think kept me from going the dehydration-deterioration route. DS3 I only needed medication for a small while. However, I have known people become more ill with the second, TBH I think it varies. A lot depends on how well you care for yourself- you can't prevent HG obviously but there are certain things you CAN do (eg, sleep deprivation is inked to severe nausea, and often poeple who can't keep a drink down CAN keep dopwn ice, lettuce or melon- all high water content).
There are lots of tips on the website.
Do remember that medication improves all the time, and it really is worth fighting to get what you need- the best, unofrtunateyly, costs the NHS lots so is hard to get. I know people who swear by Zofran as the best, but also by homeopathy, and acupuncture, both worth a look imo.
I hope this helps a little, take care
X