I feel for you! I have been there 2x and that is why I'm not in a rush for a thrid one. I thow up the whole time from about 5 weeks until and/or after the delivery room. But, a few things do help:
Phenegrin works, but it gave me and the nurse both restless legs, so give it a try and see what happens. The doc can help you with that one, its a prescription.
Sea Bands, these are braclets that push the pressure points on your wrists. they helped a little bit.
Compazine...this made me suicidal, but it worked really well for the sick feeling. I had an odd adverse reaction, not normal.
The BEST one I found was ginger. My husband would cut it up into little slivers and then give it to me to take like a pill. I could do it sometimes, or others he would fill an empty gel capsule with the pieces and then I could take it. The pops, dried, candied, etc. didn't work, only the freshly cut from the root worked.
There is also a pressure point between the thumb and first finger that will help stop pain, anxiety, and nasuea. Also, acupuncture can work pretty well.
Remember, most people get over the morning sickness after the first trimester, but since you've already made it to that point, just hope that it goes away soon. Some people say to always be snacking so that you are never empty, but that didn't work for me. Also, if you find a particular food or food group that makes you sick, I recommend avoiding that. For me it changed all the time. Good luck, remember there is a time limit on how long you will feel sick!