Painfully cramps partial sub acute bowel obstruction

Hi I have secondary liver bowel and abdominal cancer from a primary ovarian cancer 6 years ago, I also developed a small bowel obstruction around August last year, I have been having my second round of chemo since April after having to stop for a while over my obstruction, I'm on cycle 7of 12 weekly sessions and was doing great everything is moving in the right direction my CA125 is going down well, but 2 weeks ago my bowel obstruction started again so the paramedics came gave me the usual meds of pain relief and anti-sickness because once I start throwing up nothing else works only through I.v, but things settled down pretty quickly so we assumed it was a partial blockage, I've not been the same since I'm in constant tummy pain with horrendous gas the growling in my bowel sounds like jurassic Park sometimes, I can't get the balance between constipation and diarrhea right , I'm on a no fiber diet which is always hard work anyway, my question is has anyone else got or had the same thing happening or have any idea what I should take at the time it is most painful, I already take slow release morphine twice daily only low dose, laxido and lactulose, I did mention it to my oncologist but she just went on about my diet, its really getting to me now and I just don't know what to do any advice would be appreciated.....