Me too! Me too!
I am 10 days out from my lumpectomy/SNB and my surgeon had to remove 90 cc from my lymph node area.
Not much reprieve, however, swelling is still happening and think that I will be in there next week for more aspiration.
I was told that build up of fluid after a lumpectomy or mastectomy is very common. There is a Breast Cancer Care booklet, 'Operation and Recovery,' which explains about seromas. The hospital should have given you a point of contact should you have any concerns, either the ward where you had your surgery done, a hospital wound clinic, or a breast care nurse. You would be wise to contact one of them, or see your GP. Apparently, in some cases such a swelling will go down of its own accord, but some patients need assistance to drain the fluid if there is a large build up. I did.
I would have it checked.