?Hello.
Thank you for choosing DoctorSpring.com.
I have gone through your query and pictures in detail. The additional photo was very helpful. The small area that you mention is a fissure(cut). It does NOT seem to be any STI including genital herpes. It seems to be due to friction as a result of vigorous washing and rubbing.
After an exposure such as yours, I understand that you have fears of getting an STI but let me assure that you do not have any symptom indicating it. The tingling and discomfort is due to anxiety. I have seen this symptom in almost all patients fearing an STI but none have tested positive so far. Since your tests are also negative, you should relax.
I would recommend application of mupirocin cream(requires prescription) mixed with hydrocortisone cream, to be applied on the affected area twice a day for five days.
In case it doesn't resolve with treatment it would be best to visit your doctor to let him have a look.
As for statistics of genital herpes, there is a risk of transmission of about 50 % if your partner was infected. The risk is lower without active lesions. However in your case, it is unlikely you have it.
Please let me know if you have any queries.
Take care.