Hello,my Nameis Christine Roy,63. History Of Bad Blood Clots,lungssubdermal Hematoma,etc,

hello,my nameis christine roy,63. history of bad blood clots,lungssubdermal hematoma,etc, also have a green filter inside to catch any more. Currently still on blood thinners,diabetic,and have had 2 boils,inside butt cheek. I went to er and they saidtheywere going down. For about a week now,bad pain and swollen from left ear to shoulder. Very painful. The pain started going into left arm,but subsided.should I go back to er or isthis a clot? I need an answer here,please?