First, I'd be interested to see her results. Can you find out if the results were given with a separate result for each type, or just one result for both? If it says, "HSV1&2", then she has either type 1, or type 2, or maybe both. Lots of doctors get this wrong and don't order type specific tests. Also make sure she had an IgG and not an IgM.
Getting herpes from a one time encounter when the infected partner doesn't have symptoms is not likely. Given that you've had no symptoms, and negative tests at 6 weeks, I'd say you don't have much to worry about. Flu like symptoms can be from a cold, the actual flu, allergies, stress, etc., so that really can't be used to diagnose anything, except maybe the flu.
I'd still be interested in her test results since that could affect her, and also future testing decisions for you.