4 months earlier I deliver a baby through c sec..at that tym I had BP issue for a week and then heart rate prob ..I test echo n ecg...which were normal..I was feeding my baby through breast pump..but due to low milk my baby is not having breast milk ..from 2.5 months I m experienceing left arm pain and left breast pain...sometyms in right arm also..sometyms just behind the left breast...I m concerned about my health..is there anything serious...is it because of no  feeding?..when I use breast pump it takes out thick milk after 10 min pumping .cause .my baby is too small...which trigger anexiety n tention in me...what should I do?