Recuurence treatment

I was dx BC in Oct. 1998 on a regular annual Ck up. Mastectomy right side, followed by intensive Chemo for 6 months, radiation afterwards for another 6 mons. NED since 2000. Tomaxifen 20mg daily for all the time. C27,29 went up to 72 in April 2003, CT confirmed mets to right lung, major one was 1cm, plus a few very small ones around. Taxotere/herceptin 3 weeks on one week off started June 2003. After two mons CA 27,29 started to drop, first to 50,then to 42, 27, and finally back to 9 in late NOV 2003. CT showed overall deminis of the small ones, and 9mm of the big ones. But in Dec. 20, CA 27,29 suddenly up again back to 38. CT in Dec. 30 showed fluid in the right lung, and a 0.5 cm on the left side of the lung. Needle test for the fluid showed no cancer cells in Jan. 22, and 90%Fluids abbsorbed itself too.(had very bad cold in late Dec.for almost 4 weeks.).CA 27,29 went up to 52 in late Jan.Swiched to Navelbine/Herceptin with navelbine 2wks on, 1wk off,Herceptin 1/3wks last week.will have CT next week.Anybody has experience of this?