this could be fungal easily or balanitis. return to your provider for further evaluation or seek out a 2nd opinion.
grace
it doesnt look anything like herpes though. Its got me all paranoid, it could just be in my head.
Multiple std testing has proved it is not related to std. BUT herpes nor trichomonas is not automatically tested for. You may want to go and ask to be tested for those specifically. Other than that, you should keep following up with your doctor on this.