The IGM test is an old test and can't distinguish between HSV1 or HSV2.
The specific IGG test can distinguish between the two. If your IGM test was positive, you have Herpes but it won't tell you which type.Also this can bring back false positives so keep that in mind
I don't know why doctors are still using the older tests but go by the IGG. IGM just gives them an idea of what to look for but the IGG is herpes specific and you will always want to request a specific test
Keep in mind HSV-1 ( the one I have) is usually the oral type but can be transmitted genitally and outbreaks are lesse severe and less frequent. Outbreaks can be confused as yeast infections and can look like scratches, red patches of skin, tender spots, swollen spots. Not all outbreaks are the classic type when HSV-1 affects the genital area.
Also depending on how long its been from an exposure, the viral load needs time to develop before the test can detect it.For example if you had a test 1 month from exposure, I would go back in 3 months to get retested. The virus usually takes 12-16 weeks to become detectable from the initial exposure.
I hope this helps you and feel free to ask questions. We are all here to help and you are not alone