Hey... I'm 17 weeks tomorrow and have had the same as yourself, started about 6 weeks and my word...the nausea! All day from waking up to bedtime as you have described. The common solutions didn't work for myself, like ginger or peppermint. I would recommend that when u get to the stage where u throw up in the morning more, I would recommend seeing if you can throw up bile BEFORE attempting to eat anything (best was toast for me) its much worse to throw up food only 5 minutes after eating it *shudders* its not at all pleasant in comparison to bile. Oh the lumps.
For me the sickness/nausea hasn't gone yet but its just morphed into something which is marginally more manageable day to day. This transition started around week 13.
I did go to the doctors this week and he prescribed cyclizine (for which I am eternally grateful) and as a result I have ate more in last two days that I have been able to in weeks. If you still have the same issues at week 13+ then I would recommend contacting docs.
Main pieces of advice for you is to eat whenever you can, learn what the baby is screaming NO to you eating. For me this was milk and chocolate (gee thanks baby)
Oh and whilst people do say little and often helps, you may find sometimes it works (I tried eating at least a digestive biscuit if I hadn't eaten for an hour or so) Sometimes you just have to wait for that small window of "Ooh, I don't feel as bad now" - go and eat something!!! Oh and if you aren't eating a lot, then make sure at least you are taking the pregnancy supplements, including calcium! I take Pregnacare for most vitamins and then spent a bit more and got the Osteocare calcium medicine, if you hate massive tablets.
Essay over