gmailconfusion Welcome. Such bad nausea certainly sounds like Hyperemesis. I couldn't work out from your message if you are still at the hospital. Excuse my ignorance, but what is m-f? It is horrible being in hospital, but if you are still there, fluids will help a lot. Would the medicine you are on be Proclorperazine also known as Stemitil? Many find those helpful. Are they combiniong it with the Cyclizine? Don't despair, as most people see an improvement at some time between 14 and 20 weeks. I hope that the meds prevent you getting so ill again. Here is my normal spiel. Might an anti acid help? Some drinks and foods of a sort that have helped others: flat full sugar coke, ice lollies, the juice of tinned fruit, Lucozade, fizzy water, Elderflower water, Robinson's fruit drinks, fizzy orange, lemonade, Dr Pepper, Elderflower coridal and tonic water (eallison's tipple), 7Up, Iron Bru, soda water, ice cubes, chocolate milkshakes (maybe soya), cocoanut milk, orange squash and sips of orange juice if not too acid. Some foods of a sort: nibbles of chips and crisps, baked potatoes, cuppa soup, cheap ice cream, tinned fruit, slices of melon and mango, Scotch pancakes and biscuits. It might be worth investing in some kesostix if you don't have them already as while they are not the best test of dehydration for reasons that Melleebacca explains below, hospitals do take them seriously. Otherwise, watch out for inelestic skin, ie skin that doesn't spring back when pulled, dark urine, headache, etc.
Melleebacca Alas, poor you, with the vomiting starting it is discouraging, but at least you kept it at bay this long. You are a twice veteran and know you can come through it this time. Here are some 
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for all the great advice for others.