I Have Had 3 Events Of Lesions On My Labia.

I have had 3 events of lesions on my labia. 3 years in a row. I have had two negative swabs (the first out break and the third) and 1 negative blood test (1 year after the first outbreak and burring the second). I have only been with one partner and he is negative for herpes and have been in a monogamous relationship for 10 years. I have been to see 2 OB GYN's and 1 NP and they continue to tell me I have herpes. I don't believe I do. Please help.