Easy Bruising and Cancer or Diabetes?

Last month I was diagnosed with cellulitus. I was given 2 medications and it went away. 2 weeks after that I had a bad fall down the stairs and hurt my forearm and back of my calf. I put some ice on it but they turned into huge swollen cyst like balls on the forearm and leg. Upon going to the ER, I was told that they were now abcesses and they had to be lanced and drained, then packed and repacked every other day. it was extremely painful. Last week i lightly bumped my leg and a bruise formed. All bruises start off as ‘hot’ and red and start to swell. Usually a lump in the very middle of the bruise. but these bruises no longer turn black and blue like my other bruises used to to. My doctor sent me to a hemotologist/oncology clinic & upon seeing the word ‘cancer center’ I sort of started to freak out. I shall mention that I am still about 40 pds overweight , my brother has diabetes as well. I am pretty frightened by what this could be. This is not a common thing for me. I have 3 kids