Welcome to ellijones and, elkiemacbride . elliejones* Congratulations on twins! Often, people who would not suffer from the scourge with a singleton pregnancy are ill with twins, but they do tend to get better earlier than other sufferers. You have had lots of good advice and reassurance from others, and I so agree with it all. Hyperemesis is on a continuim anyway, with mild cases and extremely severe ones. The nausea is just as bad as the vomiting. I gather you are not having the awful constipation suffered by so many Ondansetron sufferers? An anti acid, too, can really help with nausea.
Some drinks others have found helpful. Flat full sugar coke, ice lollies, the juice of tinned fruit, ice cubes, Lucoazade, fizzy orange, orange squash, orange juice (if not too acid) Dr. Pepper, Iron Bru, Robinson's fruit drinks, tonic water, soda water, Elderflower water, elderflower coridal and tonic water, fizzy water and sips of chocolate milkshake (maybe soya) . For foods of a sort, cuppa soup, nibbles of chips and crisps, tinned fruit, baked potatoes, Scotch pancakes, slices of melon and mango and cheap ice cream and jelly.
elkiemay I so agree with others, do get pre-emptive meds. They seemingly do help that neuroligical pattern in the brain setting off vomiting happening. It might help to take someone as an advocate with you. I hope you have a more understanding doctor than last time.
Cyzline has been used safely for about four decades. Also, an anti acid might make a big difference.
eallison I will certainly add that to the next thread. I fear that when people come on, they are too anxious and ill to read the introduction properly, but I will add it anyway. 
norbert Don't rush back to work, as all the rest is probably keeping the worst symtoms at bay. Try and do a bit more first, and wait a bit.
Can you arrange a staggered return in easy stages?
CalmberComber I am happy you had a good week. Sorry about horrible drive. A few good days are often an excellent sign of the turnaround coming up.
silversplodge You are bound to be a bit run down, but eating normally for a few weeks will put things right surprisingly quickly.
As Reastie says, the pleasure of having escaped Hyperemesis will buoy you up, anyway. Most ex-sufferers say the sleepless nights of a newborn are as nothing compared to the horrors of Hypermesis.
Harigician I so agree, it is dismal.
Much sympathy for those suffering from IBS type symptoms. Things seem to be complicated by the fact that there is some virus going about that gives you a cough and cold symptoms, plus loose bowels.
JimJam Iron tables make many people on this thread vomit, as they did me. I beieve they can give you iron drops now? I think it was Reastie who mentioned a nasal spray of iron drops, too....
I hope I haven't missed anyone out.