Hi there - I really sympathise. Just back from my second overnight stay in hospital within a week. Was diagnosed with hyperemesis and had +++ ketones so 5 drips later and various drugs and beginning to feel human again.
Just a word of advice to any other sufferers - the first time I was discharged they sent me home with cyclizine tablets (I had this in hospital through the IV and it worked well but notoriously less effective in oral form). However, 3 days later it just lost all effectiveness and I was back throwing EVERYTHING up.
This time they've also given me Metoclopramide which (fingers crossed) seems to be more effective but I had to really push for them to give me something other than cyclizine. Obviously, in pregnancy you have to be careful but I don't want to make the hospital trips a weekly outing!