I had morning sickness and all day nausea from about 6 weeks onwards and to be honest it still hasn't fully gone. For most ladies, eating little and often, ginger, peppermint, lemon, sucking on ice, etc can help.
I tried 2 anti-emetics and neither worked (luckily though I did not get it as bad as some in that I was still able to stay hydrated and didn't need a drip or hospitalisation) For me the nausea is the bigger problem as smells, etc can have me retching and if i come across any food that's gone off thats me dry retching for the next half hour!
The only thing that now stops me from feeling the nausea daily is acupuncture. I only wish i had started it earlier as I didn't go for it until I was well over 12 weeks! (and Ive had it lots of times before in the past for other things).
Basically, my advise would be try dietary stuff first then maybe look at an alternative therapy (someone who is trained in antenatal care though). Someone on here even had acupuncture from their GP on here (which is when i thought to give it a go!)
I hope that it all passes for you quickly, but if like me, it doesn't then don't give up on looking for 'cures'!X