I have a large soft lump (swelling) in my shoulder above my collar bone it feels like it is in front of my trapezius muscle not sure if it is related to me sleeping the wrong way the other night when I fell asleep with too many pillows under my neck but it has been there for a while now . The swelling is very soft and almost feels fluid like .After an ultra sound on the area the report came back that there was one slightly enlarged Lymph node in left supraclavicular region measuring 16mmx19mmx10mm with normal texture and no increased vascularity the report also says no other abnormalities seen within the area I am now wondering what all this swelling could be??