minty are there more/alternative antisickness medications they can give? Supposedly there are nine but not all are suitable for everyone. I sympathise as I had nausea for 20 of the 21 days of my cycle. Lots of people seem to swear by Emend but I couldn't have that.
I had ondansetron with my infusion and between that and the steroids that was my best day of the cycle, frustratingly. The nausea would start that evening. I managed to keep it so I only actually threw up a few times each cycle though. I was on domperidone permanently (think they're less keen to use this long term now), then I had cyclizine, metoclopramide, prochlorperazine and ondansetron to take as needed.
I still take cyclizine now when I have nausea and it usually sorts it. I find that if I leave it too long between the onset of the nausea and taking the tablet then I will usually throw it up, but I don't know if I would throw up anyway or the tablet triggers it. I always carry a salty snack in my handbag (at the mo, mini Ritz crackers) as I find my stomach sometimes feels suddenly empty, so if I don't eat I would feel sick.
I also had some seasickness bands, which seemed to help. I don't like ginger much, but I found the Lotus caramelised biscuits (speculoos biscuits) helped a bit with nausea too. I used to keep sachets of those in my handbag, coat pockets and hidden around the house, car etc.
Sorry that was a bit rambly and I feel like I might've said this before
either way, I hope you feel less grim soon 