8DaysAWeek Welcome. Sorry things are so bad. Has the doctor not put you on any meds? When you say ten vomits a day, do you mean ten separate episodes of several heaves? The reason I ask, if dr's often count heaves as 'vomits' and may be underestimating the sickness.
It is very annoying that medics rely on ketones to admit women with this, when as you say, they can be kept down by eating and you can be dehydrated. He obviously sees you are dehydrated. I think it might be worth phoning 024 7638 2020 Pregnancy Sickness Support, who will phone back with good advice about obtaining more effective meds. Meanwhile, some drinks and foods (of a sort) that might help.
teran, I wouldn't normally be quoting my list of drinks, etc, but you might find one to help. Some liquids tlat have helped many; full sugar coke, ice lollies, ice cubes, the juice of tinned fruit, fizzy water, soda water, Dr Pepper, Lucoazade, Iron Bru, fizzy orange, lemonade, orange squash, orange juice (if not too acid), Robinson's fruit drinks and sips of chocolate milkshake(maybe soya). Foods of a sort include cuppa soup, Scotch pancakes, nibbles of chips and crisps, tinned fruit, slices of melon and mango, baked potatoes and cheap ice cream.
Applesin I am sorry. An MMC is particularly upsetting because it is so long drawn out. For the moment, you will only want to mourn and get ready for the treatment, but when you want to try again, the chances are very much on your side that all will be well next time.
Mambabear They are usually reluctant to sell to pregnant women although they use them in hospital. Can anyone else buy them for you or can you go somewhere were you are unknown? Lactulose can be bought over the counter too.
Ohiwa Thank you for your lovely encouraging message. I am glad baby is thriving. 
Interesting that the new drug helped you a lot.
beanhunter I am so sorry you have had to go back in so quickly. Good about scan.
tinyradish What did the doctor say?
Silversplodge and others - I so agree about baked potatoes! I always put them on my list. Very healthy, too, unlike so many of the other bearable things.
Apologies to anyone rudely ignored.