Ok so I’m got g through the last part of my treatment for past breast cancer , herceptin every three weeks from last March until next march. I also almost two months ago just started working basically full time in a grocery store deli which is very very physically demanding. So about a month ago I started having numb tingly arms and hands I noticed my joints In my finger are red and swollen . It wakes me up all night from painful numbness ,and .my back and shoulders are always knotted up . Tplight I was rubbing the knots out of my neck and I got a little dizzy. It wentailed away but now three of my fingers on my right hand are painfully numb. I’m female , 48, I had a lumpectomy and partial node biopsy last August with good margins but a few risk factors .can u tell me what u think?