hi sarahtp
hope you start getting some answers soon. You are indeed getting a good treatment regime but I think there are other chemo combos that they can offer. A friend of mine recently went onto xeloda/avastin combo when he had his 4th relapse in 7 years.
There are also monoclonal antibody type drugs like erbitux (cetuximab) which can also be used in some cases where chemo is not working. I think these can also be used in combo with conventional chemo too. There are other drugs of this type but I cannot remember names. I do not know if they would be effective for you but maybe it is worth discussing with your docs to see if they have considered them.
good luck sarah, keep us posted
ktee