Don't risk it. Go to a Dermatologist. Some general doctors may not know just by looking at it. I went to one general doctor who gave me ringworm medication. When it didn't clear up, I went to a Dermatologist who told me it was psorriasis, and that an antifungal wasn't the best treatment... Another time I went to a different general doctor and told him I had ringworm. He had a puzzled look and said, "Usually it's homeless people that get that." I had to explain that it's common for grapplers.
Staph is serious and can really mess you up if you don't get it diagnosed and treated quickly.