I Was Diagnosed With Genital Herpes Almost A Year Ago

I was diagnosed with genital herpes almost a year ago as I had visible lesions. I have recently had the HSV iGg blood test and if came out negative for HSV 1 & 2. Is it possible that it’s a false negative (after a year) or an incorrect initial diagnosis? I have heard you can get false positive tests but false negatives appear rare especially after one year. Thanks