Health class jitters ?

So I’m a freshman in high school 😂 I’m a virgin and I don’t do anything sexual or touchy I’ve only kissed that’s it ...so we have been learning about stds and now I have this huge fear that I have an std even though I haven’t had sex 😣... she said the most common one is herpes so I’ve been looking it up and genital warts and keep checking down there everyday to make sure I don’t have anything idk if ive had a cold sore or anything when I was younger and maybe it traveled to my private area ? Or what if I used the same tag as someone and caught herpes or another std ? My dad thinks I sound crazy but I constantly think I’m sick