Here are some older posts concerning the IgM test:
LabCorp's default test is a non type specific IgG test. If this test returns positve, you'll then be tested with the HerpeSelect ELISA for hsv2. If the hsv2 test is negative, then it's assumed you're hsv1 positive, and no further testing is done. If the hsv2 test is positive, you're then tested with the HerpeSelect ELISA for hsv1. (Source: LabCorp web site) Personally, it find this a waste of time/money, since the wholesale price of a HerpeSelect test types is about 20-25 Dollars.
Labcorp does offer the HerpeSelect test, but it needs to be requested.
Your IgM should be tossed, and you're IgG is negative.