Experiences with Sentinel Lymph Node Biopsy

I think i should not have agreed to have sentinel lymph node biopsy during my mastectomy when it was found to be negative of invasion.I lost my protection in my left arm. i cannot have wounds, healing is delayed. i cannot carry heavy objects. It's scary! Maybe the doctors could just have taken only the first level and not two levels-a total of 16 lymph nodes. it's done and my lymph nodes can not be put back. i am not sure if i am right. It is my opinion though.