I felt exactly like you after first and second FEC.
My oncologist ended up prescribing larazipan(I think) it is an anti anxiety medication but works great for nausea. I took it the night before and morning and night on day of chemo it was brilliant. Also helps you sleep. You will need someone to drive you though. Makes you feel very relaxed. I had to hide it at the back of my medicine cupboard as apparently can be addictive and was worried I liked it too much LOL.
good luck.
On another note the anti nausea drugs can be very constipating so,I lived on prunes and pear juice the day before and the days after chemo...if you can stomach them
Big hugs.
Hang in there.
"This too shall pass" my mantra during chemo xx
Paula