have some symptoms but no diagnoses

I am a seven year survivor of ductal carcinoma of
the right breast. I had the usual slash, poison and burn treatment in 1998. Since that time I have been cancer free with some side effects from
chemo and radiation. In december 2004 I was due for my regualr mammogram and my breast was so swollen and sore that I thought I could not stand to have it done. However, it became red, inflammed and feverish so I did see a breast specialist. I had an ultrasound and mammogram done at that time in January, results negative for tumors. The redness and fever has subsided to pink but the swelling and soreness is still present. The doctor did not seemed very alarmed and said that he could not necessarily rule out IBC and he would do a biopsy if it would relieve my anxiety but he did not see the thickening of the skin or pitting or any of the other signs of IBC. I have an appointment for a follow-up at which time he said he would do a biopsy if I still felt concerned. I asked him what this could be if it was not IBC and his reply was "I can not tell you; let's just call it Breastatitis" This was a rather sarcastic remark
to me and I felt that he though I was being overly anxious. I chose not to do the biopsy at that time. I still have itching and the redness is sometimes worse and sometimes pink but the soreness is so much that I cannot sleep. Can anyone give me any advise about whether I should go on with a biopsy or will this just be another
thing that I will have to live with. If it is just another side effect of radiation or a lymphadema I can live with that as long as it is not going to kill me. Please anyone who has any
information or advise answer me as I am feeling lost again. Since going through this once I am
a little alarmed as I think anyone might be. Thank you for your help