neck lumps

[Cam]

Hello everyone, I'm new to this site, looking for some reassurance if there is any. I was diagnoised with stage 1 (small 8mm) breast cancer, right breast, on my breast muscle and also had LCIS in my left breast. I chose a double mastectomy. They removed about 5 lymph nodes. In third lymph node they found the HER2 gene. I am also Estrogen Pos and Progesterine pos. I had 12 rounds of Taxol plus Herceptin and am now on my 5th Herceptin alone treatment, 8more to go. I take Arimidex also. My problem is I have had two lumps in my neck which is worrisome to me since I also have CLL, chronic leukemia, stage 0. I heard the neck lumps could be caused by the Herceptin. Any thoughts? I will be seeing my hemotologist oncologist on Friday. Last time he checked he said its not bad, its not good???? Any thoughts?