I've recently discovered that I have a cold sore on my lip which I thought was a spot. I've had cold sores before, not very often, however this one didn't come up as mine usually do, it felt more like a spot. During the time it's been on my lip I've kissed, had sex and oral sex with my partner as I didn't think the spot was an issue. Now I've found out that it's a cold sore, I'm worried that he could get genital herpes. I feel really bad that I could've given it to him. If he has got it, how long will it take to show up? Has anyone got any advice on what we should both do for our next steps?