Aw Tigerfeet, you poor thing. I had it last time round, it is awful.
I can tell you what I did, maybe some of it may help you. I drank flat lemonade by the bucket load, sometimes it stayed down, sometimes not. Ate when I could, avoided jobs/stuff that made me sick and slept when I could. I didn't have any children then and it was only me and dp to cope with though. I really feel for you
The midwife recommended I took an iron supplement too, she suggested Floradix. Its available without prescription, but is foul tasting in liquid form so I would try to get the tablets if you can, I couldn't get them unfortunately! I didn't have to go to hospital thank goodness, I think it was down to the lemonade. I wore sick bands ALL the time, don't think they helped much though.
Its great that you have been giving an antiemetic, I wouldn't expect a magic fix but it should help, mine did. Might be worth taking some vitamins or a pregnancy supplement too. My doctor told me not to worry about the baby, it will be getting everything it needs from your supplies at the mo. Have you been signed off work? Is there someone who can help you take/collect your DD from school?
I would def consider the acupuncture as the other thread suggests. I didn't do this (wasn't aware of it!) but I know people now who swear by it. It can be expensive but I think anything is worth a try when you have HG.
I started getting better around 14 weeks, the vomiting slowed right down. I was sick a couple of times a day till I was 23 weeks but it was manageable and I didn't need the antiemetic by then. I really hope you can find things to help you and you start feeling better, I will be thinking of you. Good Luck!