Cold Sore Drama!

Omg two weeks ago I gave my hubby a BJ. The next day a cold sore had developed in the corner of my mouth. I had no induction on BJ day or I wouldn't have done it. My hubby developed a pimple like painful bump on his penis yesterday. Tmi but it popped like a white head. Says there is another one today. I know HSV can be transferred from oral to genital. So scared. No experience with STIs. He keeps jokingly saying I gave him herpes. Could it be true?