Hello, I Need Some Help In Making A Decision. I

Hello, I need some help in making a decision. I contracted MRSA after my hysterectomy December 2014. There were 2 very bad spots on my labia. About a year later Nov 2015 I got it on my knee (celuitius). Now today I have it again! It's on my laiba. :( I have had it since Wednesday. I am on bactrim however I do not know if that's enough or if it needs to be lanced. I am between gyn's which is why I am asking you. Do I need to go to ER or urgent care?