Question: can a syphilis chancre resemble a ringworm? Also i would like to know if it does not sometimes resemble a ringworm, does the chancre appear round and firm over night? or does it take a few days to develop?

I had sexual encounter with a man who moved here from mexico. We used a condom, but mid-sex the condom slipped off inside me. I believe we had contact but im not sure. Anyways we used another condom. I'm a hypochondriac and always have safe sex. He assured me afterward that he was clean. This happened XXXXXXX 24 2016, its now almost two weeks later 7/5, and today while i was showering i had an itch near my vagina. i scrubbed it with my body scrub, and when i got out i used a mirror to see what it was. It look like a ringworm. Its barely visible, but i can make out a faint red ring and the center is my normal skin color. its slightly tender, and was only itchy when i showered. please get back to me as soon as you can. Im planning on seeing a doc this fri. Also what are the chances of catching HIV? He didnt come inside me, obviously but he did say tht he was almost there when the condom had slipped, which makes me think maybe he was pre- ejactulating. Your thoughts are much appreciated. Thanks

Thank you so much for answering all of my questions. you really put my mind at ease.