Around Two Years Ago I Had Breast Pain And Swollen

around two years ago i had breast pain and swollen lymph nodes also had chest wheezing. i have had a lung scan, fibroid check and breast scans. My mother died aged 57 of cancer which they dont know much about. medical staff were very vague with detailsand told me that it was an aggresssive cancer which spread quickly. around 2 months ago the pain in my breast and undr arm area came back and sometimes wheezing. I also have a strange chest pain under the left breast/ breast bone area which am suspecting is my diaphram. The doctor sent me for a ecg. which am told was normal. my blood test results show healthy white cells although doc is concerned about thyroid. I feel very tired most of the time, although i get enough rest. I eat a balanced diet and rarely drink alcohol.