safety of iron infusions

I am a 48 year old female with a history of breast cancer. Jan 08 blood work showed I was slightly anemic. My results on Jan 08 were: hemoglobin, 11.1 hematocrit 33.0 MCV 83.1 Oncologist ordered Iron panel, ferritin was 8. referral to a gastro specialist, endoscopy, colonoscopy, fecal occult blood, smal bowel series were normal. repeated the blood work in April 08. Results from April 08 were: Hemoglobin: 12.5 Hematocritt 37.0 MCV 80.9 Ferritin: 10. Gastro doc wants me to have iron infusion (dose:1gm). Since I am not anemic and my levels improved without any treatment, do you think it is okay to go ahead with the iron infusion? I am reluctant to get the infusion as I read somewhere that iron is not good for cancer because it sitimulates the growth of blood wessels.  What do you think could be the reason for my low ferritin levels? Should the gastro doctor investigate it a little further before giving me the iron infusion?  I am also in menapause as I had my ovaries removed in Oct 07.
Thanks for your time and assistance
Sincerely