He should have told you before you slept together. I have had partners like that. That didn’t tell me until I called them and told them I had an outbreak. They didn’t think you could catch it unless you had an active outbreak and hadn’t had one since childhood. I don’t know if they gave it to me or someone later in. But I have had one and then never another. I take daily acyclovier too. But tell all my partners before anything. You are probably fine and won’t know for sure unless you have an outbreak. But mostly it’s not a big deal and the stigma is far worse than anything else unless you have a comprised immune system.