No syphilis would not show that quickly and you would have to come into direct contact with a syphilis sore.
Do not apply anything to it, but it doesn't sound like an STD. I would see a Dr but I would not worry about it.
Thank you so much.. Well i am getting tested tomorrow just in case... if anything do you think its too soon?
by the way this happened about 3 days ago
I think you need to let a doctor see it, and if he thinks herpes or syphilis (which would be from another encounter, not this one - it showed too soon), then insist on a culture and blood testing.
Aj