I had a herpes scare once, unrelated to infidelity, but was stressful just the same. As someone who went through this, I'll try to relay some helpful info.
There are two different types of tests for herpes, Igg and Igm (these are the different types of antibodies your body produces in response to the virus). Igm shows up the quickest, but it can also dissipate over time and might not show up if there is not an active lesion. Igg can take a little longer to show up, but once it does, it's there for life.
Some doctors do Igm at first thinking you'll want to know as soon as possible, which I get. But it can be really inaccurate! For one thing, it can't tell the difference between type 1 and type 2, so considering that depending on what source you utilize, anywhere from 50-80% of the population has type 1 (cold sores/canker sores etc.) you can get a false positive for type 2 pretty easily if using Igm.
This is what happened to me. I have had type 1 since I was a little kid. If parents have it, it's commonly passed down to their kids when they share drinks, give them a peck on the lips etc. I honestly don't remember a time when I didn't have it, the occasional canker sore was just a part of life that I learned to live with, and honestly had no idea it was a type of herpes until I got to sex ed in high school. But I went in for an STD panel in my 20s and was told that I had type 2! I was positive for Igm antibodies, negative for Igg, and they told me that this meant that I must have just recently contracted the virus, and that's why the Igg hadn't shown up yet.
They did not give me any further info about the likelihood of false positives, didn't tell me to follow up, basically just said "sorry, this is your life now" and sent me on my way. Holy shit for like a year I thought my life was over. I went into a deep depression, thought I would never date again etc.
Then, after discussion with my mom about how I had never shown any symptoms, I did a little research, which is how I found out about these two types of tests. So I went in, got re-tested using Igg instead, and bam! Found out I don't have type 2 after all. Igg, while it can take a while to build up, can accurately identify type 1 vs. type 2, and it stays in your blood permanently over time, so once you test positive for it you will always test positive for it.
Found this info when I did a quick search of igg vs. igm:
The challenge here is that the time it takes for IgG antibodies to reach detectable levels can vary from person to person. For one person, it could take just a few weeks, while it could take a few months for another. So even with the accurate tests, a person could receive a false negative if the test is taken too soon after contracting the virus. For the most accurate test result, it is recommended to wait 12 – 16 weeks from the last possible date of exposure before getting an accurate, type-specific blood test in order to allow enough time for antibodies to reach detectable levels.
So if I was in your position, I would get tested now, and ask for the Igg test. I would hope your doctor is more competent than my former one, but it can't hurt to be as specific as possible. Then get tested at regular intervals for the next several months, just in case it's something that is slow to develop.