Navelbin--hope I spelled it right.

I just had my first session with Herceptin and Navelbine today. I have had Herceptin for one year in 08/09. Then again this year starting 6 months ago together with Xyloda whic I tolerated badly and had to go from 4150 mg per day to 2150 mg per day. Sadly the mets had grown as of my last scan last week so hence the change. I get this treatment every 3 weeks and I wonder why some of you get it every week and what the dose is then. I would also like to find out why and when Tyverb is added to the "coctail" - ready to take anything now.... mets in both lungs, can't remember the sizes but scary all the same...
Wishing you all the very best!
Lena in Sweden