ethical dilema

Dear all
Have been to the onc and he thinks the area looks sus. I have to have a biopsy tomorrow and then scans on friday and another appointmnet on Monday.

I will then go on the trial for GW5..... and xeloda. The dilema is this. If you are randomized into the arm which does not get GW5... you also do not get herceptin.
This worries me and if I was not going on the trial the next chemo would be xeloda and herceptin anyway.I know it is ethically not fair to abandon the trial if I do not get the arm i want and the onc says the herceptin doesn't appear to be working for me anyway - I think it is - I have only had local progression.
I just feel safer with herceptin.
Can anyone help with dilema

love
linda