Genital herpes and insemination

My best friend and I have been friends for the past 15 years (I’m 36). I start to ovulate next week and have already did my first insemination. He usually tells me any and everything but told me that he had been diagnosed with genital herpes in his twenties (he is 37) now after we inseminated. He claims that he never Took meds for it and that was that (wtf!) Everything was done with a syringe but now I’m worried because I have been std/sti free my whole life, not even a yeast infection. What is the likelihood of me catching herpes now? He has an appointment to be tested for everything again (the only test he had done was the hiv/aids test two weeks ago) which was negative.. but herpes stays in your system treated or not and I’m freaking out.