The mind can cause several things. Have you ever watched that movie arachnophobia (fear of spiders)? I don't have a damn thing crawling on me until I watch that movie. Mind can play tricks my friend. If you are worried you can test at 6 weeks and get a damn good indicator. Add in a 6 week negative and the facts of your incident and it will only solidify your negative.
learn from most of us here dont read about symptoms that will be your downfall and all of them will happen to you anxiety will cause your body a lot of pain so be wise and be careful the itching is coming from a think called nerves you are to upset about having some kind of std
One more question.....I have been itching a little bit on my hands and legs since yesterday. Itching only starts when I think about it. Is that something unusal?
One the women probably wasn't infected. secondly you used a condom. third it wasn't broken. As long as the head of the penis did not exit the condom and go into the vagina unprotected you are safe.