Hi. 10 weeks ago i had skin sparing mastectomy with sentinel node biopsy. The SNB was done internally while the mas was done, so i didnt have a 2nd scar under my armpit. 3 weeks ago i had implant recon. The SNB revealed a micromet 0.9mm, grade 2 ILC and they arent unduly worried about further node involvment. However, I have just noticed what feels like a lump under my armpit. Is this normal, as it cant be seroma, even though i've just had 2 operations close together??? It feels hard, so maybe its internal scarring. Obviously, in the back of my mind i'm panicking, thinking 'cancer', even tho they say the cancer was removed.