I Have Had An Ablation This Year, And A Defribillition

I have had an ablation this year, and a defribillition process to see if my atrial fibrillation can be rectified, it didn't work, and now I have a large red circle under my armpit, thought it was a sweat rash at first, but it is still there, could these heart procedures that I have had, have stirred something up, I am scared to go to my doctor at the moment, so would appreciate any advice, the ablation was especially painful, as they had to burn off something in my heart to see if this would help, not sure if it did