PLEASE HELP!!!!! MRSA Staph Question.?

Alittle over a year ago i had a BAD boil, and turns out it was MRSA. I got it lanced then took the antibiotics and it went away. But a few minutes ago i felt a small pain and rubbed the scar and felt a small bump under the skin. It was never there before. Is it possible it came back in the exact same spot over a year later? Please help me! I don't want to waste a Doctors appt if its nothing bad but i will go to get it lanced again.