Hi, My Name Is Octavia Johnson, I Went To The

Hi, my name is Octavia Johnson, I went to the hospital about a yr ago because i fell and hurt my arm. At first, what I thought was a dislocated shoulder they said everything was fine. A mth later I went to get a cyst removed under that same arm, the dr. raised concern about a knot on my arm. I explained to her that I had fell a few mths prior and that now I have that. She said that it looks like a lymph(non-cancerous) tumor and that I should get it checked out. Well today I went and got it checked because it's now 4 times swollen and very painful I told them everything that happened even up to my shoulder incident. They took x-rays everything came back normal nothing in the blood that showed up abnormal. My question is why is it still swelling and painful if nothing is wrong??? Thank you for your time.