Newly diagnosed HSV-2

Hi there. Newly diagnosed with genital herpes. I have had symptoms for 3ish weeks before I could get in with my doc today. My partner just started showing symptoms yesterday. Not sure who transmitted it to who; but we’re assuming it was from a previous partner bc we’ve been together 4 years with no cheating. Do you guys have tips to prevent further outbreaks? Any vitamins that work? Or things for symptom relief? Thanks guys!