i am 35yrs old female, mother to eight months baby girl, for 4 months now have been having pain on my left now spread to my chest, back, right breast and swollen lymph nodes underarm not physicaly seen but by ultrasound, treated for infection with antibiotics but oral and iv, blood test and ultrasound shows nothing unless the swollen lymph nodes, breast specialist said is nothing to worry about. did exclusive breastfeeding for 6months. so worried