Anxiety out of control

I went to the doctor and found out I have a virus. It's spread by skin to skin contact and it's basically a strain of chicken pox. Thing is, I never have skin to skin contact with anyone but my kid and husband and neither of them have it. It can also be spread by sharing towels and clothes which I also don't do with anyone but my husband and kid. It started on my butt cheek and spread around to my cootch. How the heck did I get this? At work we have a separate bathroom from the customers. I don't understand.