worried weird rash

so yesterday my leg started burning and itching I looked at it when I got home and I have a spot maybe the size of a half dollar its blood red with a lot of little yellowish green blisters in it and on the outside of it all its pink n puffy ive never seen anything like it and its painful and itchy I have a doctors appointment Wednesday morning reg check up is this something that can wait till then or should I call n see if I can go in today?? and what could it be?

About lora knight
Born: Corbin, Kentucky
Current: Middlesboro, Kentucky
Birth: January 04
On Moms.com since: Apr 15, 2014
22 years old I have 1 son xander rockstar massengill n am currently 33 weeks pregnant with my daughter kaydince.