clinical trial

HI, I just had a CT after 4 months and it showed the small tumor in my RT lung is slightly larger but what concerned the doc was that I had inflammation and fluid in the area behind the original tumor spot in the fatty connective tissue. I had rectal cancer just at the sigmoid. Doc believes it's disease progression. Since I've already been on xeloda with Avastin for the past 10 months they want me to try a clinical trial including Imatinib, Avastin, and metronomic cyclophosphamide. Anyone out there that has been on these before?? I can't take Erbitux because of the K-ras mutation, and I've already done 12 cycles of folfiri. I've been in the fight 3 years.