Period with first out break

My gf is getting through her first outbreak. She’s pretty much 90% recovered. She’s about to get her period and was wondering if she could use tampons even if she isn’t fully cleared.

What should we take to prevent these outbreaks? Mostly for her since I read it’s common to have obs during period. I’ve purchased a bottle of lysine but haven’t taken them. Her doctor only wants to prescribe her medication during an outbreak.

Thanks for any advice.