I also have no bowel movements for 4-5 days after a cycle of carboplatin/paclitaxel, but do not have vomiting or significant pain/cramping. Just some acid reflux, which I control with Pepcid. During my first 6 cycles, I took Miralax, which didn't really help, but caused something of the opposite effect when things did finally start moving. I was not eating a particularly high fiber diet, and for days 3-4 after the infusion could barely force myself to eat at all. I do eat oatmeal.

I recently had a recurrence followed by 8 more cycles of carbo/taxol. This time I ignored the constipation, knowing it would resolve eventually, and just took Pepcid as needed.

I don't know whether it's possible for you to ignore the constipation and just try to suppress the other symptoms. Did you try taking Zofran and/or Compazine for the nausea/vomiting?