Dear Rlara02,
My, you certainly have had a rough start.
You have been very unlucky.
I had EC (Epirubicin and cyclophosphamide) not AC. I believe that they are similar.
With my Chemo sessions , I was given Intravenous Dexamethasone and a capsule of Akynzeo (netupitant/palonosetron) and oral Dexamethasone for 2 days after. These were all given to prevent and control early nausea with my chemo.
I did not have nausea at all, but not what you want to hear now.
I don't know if these are standard treatments, or if you did receive these, or did not.
Certainly discuss your nausea and vomiting with your Oncologist. Perhaps your breast care nurse if you have one too.
You could phone your Chemo suite and ask the Nurses there for an opinion.
Dehyrdration can be dangerous, if severe go to hospital. Immediately tell them you are on chemo and wear a mask.
So that hopefully you would be separated from other patients. (risk of infection to you)
There are quite a few anti-nausea drugs.
Ondanetron comes as a dissolving tablet, no need for a drink, until of course after it works.
Definitely get medical advice.
I hope that you feel better soon, and get advice at least prior to your next Chemo.
Thinking of you, keep in touch.