Bellaphont Definitely ask for something else, there is for instance, Xonvea, the new super safe medication for vomiting in pregnancy. It has helped a few on here. Also, do try and anti acid. Are you new on the thread? Sorry if you aren't; I seem to be very vague at the moment. If you are, the advice below might be useul for Neurotic90.
Neurotic90 Welcome. Sorry to hear things are so bad. Definitely that sounds like Hyperemesis. Do ask the doctor for meds and mention each heave as they sometimes cound individual heaves as vomits, and also how you can't retain water. Here's my normal spiel which I hope might help.
Most sufferers find that they improve a lot at some point between weeks 14 and 20. Even those who are unlucky enough to suffer throughout generally are not as ill later on as they are in the first part. A good anti acid can make a surprising difference to the sickness. Kesostix are worth buying online or from a chemists, as while they aren't they best test of dehydration, hospitals take them seriously. Some drinks that have helped others: full sugar flat coke (if you don't find it too acid), ice lollies, the juice of tinned fruit, Lucozade, apple juice, Ribina, Dr Pepper, soda water, Elderflower water, tonic water, ice cubes, Iron Bru, lemonade, lemon squash, orange squash, orange juice (if not too acid), fizzy orange, 7Up, isotonic drinks, sips of chocolate milkshake (maybe soya), fizzy water, apple juice, Robinson's fruit drinks, Rubicon sparkling mango drink , raspberry Lucozade sport and frozen ice cubes of flat Lucozade sport . Foods of a sort include tinned fruit, cuppa soup, nibbles of crisps and chips, cheap ice cream, Scotch pancakes, bagels and biscuits.
SnowWhite2020 How lovely to hear from you!
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Congratulations on your baby girl. What a fine weight. Thank you so much for your lovely message of encouragement and kind words. I am so glad that the sickness has now gone - with some people it does linger a little but it always goes! Enjoy your arrival at the fabled Pink Castle in the clouds at the end of the horrors of Hyperemesis.
Waves to KatlieFTM Anya212 - great advice from you and Dutchess, composed and everyone. Bunhead34 What an infuriating pharmacist! So judgemental. Humph! 
Apologies to anyone I have rudely overlooked.