I'm sure you already have your answers by now, but thought I'd post just in case!
Yes, it can lay dormant for many years. Yes, it can spring up again at another point in your life. You could have got it when you were 16... and now it's going to hang out pretty much forever.
When I tested positive, I freaked. Bad. I felt so dirty for having an STI... I even had Guardasil back in the day but apparently it didn't protect me from this strain. My doctor assured me that the majority of women get it and it stays in their system but it never does anything. When you test positive, it means that it's acting up (like your vag has the flu) and cells change a little. Doesn't mean that your hubby is cheating. It could have been from your HS boyfriend!
Hope this helps!