Then the day after, i engaged in oral
sex with my partner. Today however, i woke up with a visible
cold sore developping. I am very worried about the possibilities that i have given my girlfriend genital herpes through oral sex, even if i had no blister or visible signs. Is what I'm saying possible, or am i just worrying. Is it even possible to transmit it when there is no blister? Please let me know, i am very worried. Thank you.