I've pus like sores at the corner and in my nose. Doc say its herpes brought on by stress this ocurr times before but could it be staph infection?

HSV or Staph. Sometimes it is hard to tell if it is hsv or staph, and sometimes it can be both--hsv lesions can get secondarily infected with staph. A simple swab culture could find the staph and a topical antibiotic like bactroban (mupirocin) can usually fix it. Hsv certainly can be triggered by stress.