Lots to look forwards to. Stop reading the media stories because rarely do they tell people the exact story. Often the media will cherry pick articles from different sources - which they never put at the bottom so that we can do our own research! - much of which might be 20+ years ago.
If you are worried about your sexual health then visiting a UrinaryGynea or Special Clinic at your local Hospital might be the way to go. There are walk-in Clinics with professional staff where you can discuss any worries. They have seen/heard it all before

and nothing on Earth that you might have lurking, is likely to be 'new' to them. If you history is giving you guilt, then maybe some counselling/talking therapy will help. I think many ladies in your situation 'go' astray - needing to prove that they are still attractive and desirable

. Probably human nature to validate feelings!
Our bodies carry all sorts of stuff, bacteria etc. that helps keep the body healthy: there are good and bad bacteria! Herpes Zosta I think the name is, can lay dormant for years but erupts as cold sores, usually around mouth or genitals when the body is stressed, as can shingles which is a similar virus.
Let us know how you get on. I had cancer in the 1990s and every day is a bonus

.