He could've given me something

My husband tried to cheat on me with a friend of mine a few months ago. She told me about it the night it happened and I confronted him. He blamed me for being busy with school and our children, said he was feeling neglected. We've since worked through it but there's still some bumps in the road, for instance, I've lost trust in him and second guess everything he tells me.

Yesterday this friend called me and said that she found out she has herpes and she's probably had it for over a year now. She went to the doctor for her annual checkup and was told that she needs to talk to her partners. Why did she tell me? Is it because they actually had sex and she's in her own way, warning me?

I told my husband about the call and he literally looked me in the eyes, 20 seconds passed and he goes "so we're just waiting on you to finish your makeup and we're good to go", like I didn't say anything.

Now I know herpes isn't exactly a death sentence but it just as easily could've been something worse. How could he put us at risk like that? How could he put me at risk? I've always prided myself in taking care of my sexual health. I didn't sleep around and everyone I dated exclusively got tested before we became active, even him. I'm honestly trying not to let it bother me and I've already scheduled to see my doctor but he I'm still wondering why she called me.

EDIT** I haven't had any breakouts but I can't say for him. She usually gives too much information but we haven't been talking as much since March, so this random call was suprising and alarming.