Sounds like a classic case of hyperemesis. This is my second pregnancy. With the first, I had morning sickness, threw up a lot, but it was manageable and only lasted the first trimester. This time, I developed hg around week 5, but it wasn't diagnosed until about week 10. I missed 5 weeks of work and lost 15 pounds in 3 weeks. I literally could not keep anything down, not even water, and had to go to the hospital numerous times for rehydration treatments. On top of that, I had major food aversions, and even the thought of a food (let alone sight or *gag* smell) that was on my "no" list was enough to have me barfing in sinks, ditches, flower beds, and hallways.
The standard way hg is diagnosed is by looking at the frequency and severity of your nausea and vomiting, and your weight loss since symptoms started. A loss of 5% or more of your pre-pregnancy weight is the best indicator that you have hg.
This is not typical morning sickness, although you'll hear the "soda cracker and flat ginger ale" remedy often enough to make you want to scream. Women die of hg. It can become so intolerable that some women elect to terminate their pregnancies either to preserve their own lives, or because they cannot bear the burden of hg symptoms. It needs to be treated properly, and there is no magic formula that works for everyone. I took zofran, which is an orally disintegrating (no pill to swallow, which is good because I would have just thrown it up anyway) anti-nausea drug given to chemotherapy patients to treat their nausea. It was a magic pill for me, because it allowed me to force myself to eat for the few months it took for my symptoms to subside. That works for a lot of women, but not for all. There are other anti-nausea medications out there. For some, there is no treatment that works to control their vomiting. They have to go on tubal feedings. Some women's entire digestive system shuts down and they have to be on intravenous feedings for months at a time.
I'm not telling you this to scare you, just to impress on you how important it is that you insist on adequate diagnosis and treatment of your condition. I suffered through my symptoms for weeks, even though I had been pregnant before and knew what "normal" morning sickness was like. My doctors and nurses just thought I was a whiner, and I got a lot of guilt trips in the hospital about how I wasn't thinking about my baby and just needed to suck it up. There are doctors out there who specialize in treating hg mothers. If your ob or midwife isn't being supportive or doesn't seem knowledgeable, I recommend you switch providers as soon as possible.
There is a website,
http://www.Hyperemesis.Org, that has proven invaluable to me. When I first found the site and read the first page, I broke down in tears because it described what I was going through so accurately. It was the first time I realized I wasn't just being a wimp. There is a lot of information on the site, discussion forums for moms and other family members, and a doctor referral service, in case you need to change providers.
Good luck. I'll be thinking about you.