I woke up and felt some pain near my arms and when I saw the top part of shoulder where we have armpit fat was swollen and it was paining. Next day it reduced but still I can feel fibre like structure inside it which is paining. The pain is also causing breast pain. It's more on the left side than on right side . I am scared and worried if it's something serious. I could also feel pain in the back . I didn't find any hard lump but I could feel small circles in breast on pressing hard on the armpit area and in breast.  It's been 3 days and I am feeling very nervous please help.