Late Herceptin? Port Needed?

Hi All: Here's a couple of questions for all of you....I'm trying to convince my Onc. to allow me to take 9 more months of Herceptin. I only recieved 3 months of Herceptin treatment originally because of reduction of heart function - my heart function didn't get lower than normal, I just started out really high. I think the reason I had the temporary reduction in heart function was because I had the A/C very close to when I recieved the Herceptin/Taxol portion of my treatment and if I did it now, with monitoring (MUGA'S), I should be fine. It's been 2 years since the last Herceptin. Do you think there is any benifit for me to push for the remaining Herceptin?...my Onc is really dragging his feet over it. Also, do I HAVE to have my "Port" put back in or can I just use my reg. veins...they have never had any "chemo damage" because I had my Port for all of my chemo treatments. Any info would be great. Thanks! Linda in Calif.