This doesn't sound at all like herpes, or any other STD. If you are convinced the spot is new or abnormal, have it professionally evaluated. There are many non-STD skin problems that affect the genitals, most of them mild and easily treated once properly diagnosed. See your primar care provider or a dermatologist.
Regards-- HHH, MD
To add, I had noticed the spot was red on Tuesday afternoon. I have read that herpes opens into a sore within 24-48 hours, and is associated with pain, which makes me feel somewhat better. I am still a bit afraid. I plan on making an appointment with my gen prac Monday. In the meantime I would appreciate any suggestions.\
Again, thank you in advance!
I saw this comment before replying above. My suggestion is the same, to see a health care provider.