This isn't the doctor's forum - you have to pay to post there.
Some folks will test + for a newly acquired herpes infection in as little as 2-3 weeks after being infected. It can take up to 6 months though for some folks. The average is 2-4 months which is why we recommend testing around the 4 month mark.
The herpes igm test is not an accurate test and most of the igm tests for herpes out there aren't type specific anyways. We never recommend having it done as an adult.