Hello. I had unprotected sex less than 24 hours ago (2am). Since 9pm today, I have had this constant tingle and numbness on the tip of my penis. My testicles feel a bit sensitive. My penis hasnt been hard all day and it s very cold. I ve urinated same as usual. There s no discharge, no rash and no redness. I m worried. They say symptoms of even the earliest possible std won t appear for at least 24-36 hours but this happened almost immediately afterwards. This was a new partner. I had been in a four year relationship as of last month but was ditched. I regretted having sex almost immediately as it happened. That s all the info I can think of right now.