About 5 years ago I didn't have complete intercourse but a penis did touch the outside of my vagina, is it possible that now I could be experiencing itching from a std?
im pretty sure you would have experienced itching a lot sooner than 5 years. it might be a yeast infection go see your gyn, thats the only way to be completely sure what is going on.
Pretty much every STD that is going to cause symptoms is going to cause them within six months of infection. I suspect you have a regular vaginal infection like bacterial vaginosis or yeast infection. Your doctor can diagnose what's up and prescribe an appropriate treatment.