You're not alone. I hate waiting for results. But your appointment is just around the corner. Hang in there. You'll be ok.
I can almost guarantee you that this doctor was attempting to reassure you by letting you know how common herpes is. Remember, they estimate 8 or 9 out of 10 people have HSV-1, and 1 in 5 or 6 have HSV-2. Just think about how many people that is. Billions worldwide. Because of that, doctors can sometimes seem insensitive when diagnosing HSV. For many of them, a positive HSV test result elicits little more than a yawn and "I can prescribe Valtrex if you're getting breakouts."
I remember my own doctor going, "your bloodwork is great...liver fine...kidney fine...positive for HSV..." I was like, "what???" He completely glossed over it. You know why? He didn't think it was a big deal. He sees it all the time. ALL. THE. TIME.
BTW, you are a total rockstar for being sensitive and thoughtful enough to contact your ex. But you can only control your actions, not her response. Disclosures like this can trigger different emotions in people. She was likely feeling vulnerable, put on the spot, and maybe even a little guilty. You did the right thing by telling her and you did it well. Be proud of yourself.
You may not have HSV-1, but even if you do, there are so many people who will date you, be intimate with you, and yes, marry you. I know that from experience. It's a fallacy to think we can go through life remaining perfect and unblemished. It's impossible. We can only do our best to remain resilient when challenges come our way. The fact that you reached out in the face of this challenge shows how resilient you are.