Herpes? or something else?

Patient: Im concerned i have a STD “herpes”. I went to a clinic and got all testing done which all came back good. However the nurse that looked over my sores on my penis, she said it waasnt herpes and didnt take a culture of it. Im still concerned. If it isnt herpes which im not convinced its not, what is it them?Symptoms include, mild itchingNO: burning, not painful, no urinationproblems, no abdominal pain, no headaches, no fevers.