Couples Coping Support Group

I'm not sure how to explain everything or even what I really want to ask, but I'll try.

My husband & I have been together about 18 mo. Married 4.
When we met, I was going through...a rough time. I was in the middle of my divorce & making stupid choices sowing wild oats I never sowed in my teens & early 20s. I think I was trying to show my ex (and myself) that someone else would find me attractive, that I wouldn't be alone forever after all, etc. But I was also just completely stupid.
From the time I met him that pretty much ceased & desisted. It was COMPLETELY gone within 2 mo of us meeting.

We're both divorced-me out of a 10 year marriage, him out of a 20 year marriage.

We get his kids every other weekend and it's hard to find a lot of alone time when they're here. So we tend to be a little more frisky right before they come & right after they leave.

They just left yesterday, so this started 2 weeks ago.
He travels a lot for his job & we knew he was going to be out of town most of the following week. When they left we took advantage of our time.
I had noticed a small red spot above my pubic area but didn't say anything because it wasn't really painful & I've had ingrown hairs, etc before.
He left on Tues morning & I noticed in the shower that my 'spot' had become a sore. It got worse instead of better while he was gone & I began feeling like I had other sores in my genital area.
When he came back on Thurs night, we made love. I wasn't hurting at the time & hadn't SEEN anything other than the original spot/sore, which I thought wasn't getting better because of where it was & the fact I can't leave things alone.
Fri I started feeling like I was getting a UTI. I told him about it Sat before he left for a 2nd shift job & also that I was becoming concerned that maybe my 'spot' was something more serious.
He had thought he was getting a cold sore the week prior to being out of town. I asked him if he could remember if he had it the last time he gave me oral.
We both assumed I was jumping at shadows.
Somehow the talk turned to exes & I said his probably had something Clorox wouldn't wash off. I meant it as a joke & in regards more to her personality than anything. But I don't think he took it that way. He shot back at me, "What about XX" the person I had been with between my ex & him. He hates this guy. Period.

I had been feeling like I had other sores so I decided to go ahead & visit a doctor on Sat. They did a urine culture & a swab of the original spot/sore.
I know it's ridiculous, but I didn't tell my husband or the doctor about my suspicions there were other sores.
The doctor put me on Acyclovir & an antibiotic because she wasn't able to get a definite on either test. She said she didn't think I had anything other than a slightly elevated white count, but she would be pro-active. She also said my husband could take the Acyclovir.

We've both been taking it about a week. Me 3x daily, him usually at least once daily. I feel like 90% of my sores are gone, but I'm going to keep taking it until I'm sure.
We've also continued to make love.

Yesterday, I finally heard back from the doctor. Urine was clear, but the sore was herpes.

Between the kids & a friend we have who was here most of the day, we didn't really get a chance to talk.
He told me he doesn't know what to think or do. He's very much a man of action, who likes to have a plan, the idea that he can't control or cure this bothers him.
I feel like he thinks I brought this on me/us. I don't want to lay the blame on him, but I've never had anything like this before, & I don't really believe his idea that it could have been dormant.

Once he makes his mind up & speaks, he usually doesn't bring it up again. He says nothing's changed between us. He still loves me & we'll deal with it.
I just don't know what to do or how to do it. Do I just let it go too?
What I'm scared of is that he thinks it came from this other guy & thing will change between us.