Cold Sores?

So there’s this guy that I hang out with sometimes and a lot of those times we end up hooking up. He had a cold core on the very corner of his mouth but he said it’s better now and all dried up so we ended up making out (but I did not kiss close to the cold sore just in case!) and he ended up going down on me. I’ve been looking it up and the internet says it’s possible to get Genital Herpes if someone with a cold sore goes down on you.

The guy I hooked up with said he gets cold sores when he gets stressed, so I would think he knows what’s okay and what’s not if he’s dealt with them a lot in the past. I’m really nervous that it’s possible that he could have transferred it to my Genital area?! I don’t have any signs or anything, it was just last night. It just makes me nervous! But he said it was healed so idk.. I probably sound so stupid, but how likely is it that he could have transferred it to me even though the cold sore was dried up and healed?