GF kissed my penis and im scared of STIs

So Last night me and my gf were messing around. We haven’t had sex yet. My penis has not been in her vagina or mouth at all. I’m scared of sex bc i had Chlamydia or gonorrhea once before and that scared the crap out of me so I’m sorta avoiding sex till I know I’m with the right person and she understands that. I totally stopped hooking up and i avoid casual sex totally. But last night she kissed the tip of my penis. I goofed. My penis is already super sensitive. I always felt pain or something go off down there. To me that is normal. I’m worried bc she kissed the tip one time, will that give me any STI if she had any? It was 1 kiss on the tip and I’m freaking out. I don’t wanna go through the itchiness again and sleepless nights. Yall got any info to toss me? When she kissed the tip, I saw a little saliva go on my dick but i quickly wiped it off and after we finished fooling around, I washed my dick with water. I’m probably taking the fear of sex too far but after the chlamydia or gonorrhea, i don’t wanna go through that again…