I had sex with a girl who was a virgin about 2 months ago, i was protected for the first few times, but later i used no condom. 1-2 weeks later i noticed a mark on my leg in my crotch area, the mark almost looked like ring worm or a chafe from my testicles. the mark was red, slightly raised at one part of the edge, it was somewhat itchy, but painless. 3-4 weeks later i developed a rash on my face, it was red and was on my forehead and one side of my face, it was slightly itchy and painful if i used shampoo or soap in the shower. My girlfriend has had no other partners and has had no symptoms whatsoever, but it seems like too much of a coincidence for me, could this be syphilis? I'm 15 and i dont want my parents to know about this, so is there anyway to take care of this possible syphilis without them knowing?