Welcome to Queenbee95. You have had great advice from others about the weight loss already. The doctors and midwives will be monitoring it. Here is my normal spiel which I hope might help.
Most sufferers find that they improve a lot at some point between weeks 14 and 20. 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, ice lollies, the juice of tinned fruit, Lucozade, apple juice, 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, and Robinson's fruit drinks. Foods of a sort include tinned fruit, cuppa soup, nibbles of crisps and chips, cheap ice cream, Scotch pancakes, bagels, slices of melon and mango, grated cheese, baked potatoes, grated cheese, bagels and biscuits. Someone recommended a wonderful drink, recently, which I said I would add to the list and - stupid Mother Hen! - I've lost the reference!
Seeker2020 Sorry, I forgot to say to the other query that the particular symptom was one I didn't know about - maybe one of the many and varied side effects of Hyperemesis? Baby will be the best Christmas present ever, anyway...
coffeecow Some have been really helped by Xonvea. It is very difficult to work when suffering badly. Would it be possible to get a sick note?
Xbambi Good advice.
I'll update the Due Dates lsit asap.