Hello Elaine,
I'm sure you have read this before (I don't usually read other responses until after I've posted mine), but there are a few things you can eat/drink to help nausea.
Sip ginger ale, ginger snaps, saltine crackers, ice chips/cubes worked great for me, I also craved anything with milk - chocolate milk and ice cream, eat small meals/snacks throughout the day, eat whatever you crave thats edible. Dont forget to try rolaids or tums for antacid- that can help with mild nausea.
See if you can get out of cooking for a little while. Smelling different foods while cooking can also turn the appetite sour and keep your kitchen aired out so no smells linger that long. Or cook on the grill often.
With my 3rd child, all I could do was eat often to keep food in my stomach and I craved salads all the time. I also felt sick constantly, but I could keep it mostly under control- until I smelled the water in the house I lived in, then I lost control and had to have my older girls wash the dishes for me and change all the shampoos in the house - no more pert plus and I still have a hard time with it 9 years later!
With my 4th and last, I was always feeling sick, then one day the vomiting started, with everything I ate and drank until I couldn't even drink water and went in the hospital for dehydration - for 3 days. the only thing that worked during my stay was zofran, but they wouldnt send me home with a script because my insurance wouldn't pay for it without a fight from my docter. The meds they sent me home with worked for 2 days, but I ended up in the hospital again 1 week after the first time - and lost 25 lbs. After a 2 day hospital stay, I got my script (very expensive -$92 for 3 8mg tablets, then got samples of zofran from my doctor. I broke what I could in half to last longer.
It worked great, and I was told that zofran was mainly for cancer patients to curb nausea during chemotherapy treatments. (which I had to experience it all firsthand, brain tumor - 6 months later, with my 13 year old daughter, currently 16 and in remission) thanks to many prayers, alot of help from friends, great doctors and nurses at CHOP and God!
They have zofran in generic now, so it should be easier to get if your nausea is that severe, ask your doctor. They do have stuff to help.
Good luck