vitamins and green tea question

Hi! I was reading the posts about the green tea, vitamins and COQ10. I am very confused because I thought tea was one thing I had to avoid. (I used to drink lots of iced tea, but stopped drinking it when I was diagnosed). I was also afraid to take vitamins because I thought it would make the cancer stronger. I think I always ate the wrong foods too. Could you please list the vitamins, tea, etc. that you are taking that you feel are helping you? ( I am taking herceptin and xeloda.) It would be so helpful! Have a great week! God Bless You All! Cathy