I’ve noticed when I use my vibrator I don’t use it on my vag naked I use it on top of the underwear I have on but sometimes afterwards I could feel myself a little itchy. Not too much but definitely itchy. And like idk but this has been going on for a while now every time I do that. And I do not have a yeast infection because it’s not a consistent itch or irritation. It’s just sometimes itchy and mostly it happens after I masturbate. What could this be? Is this normal?