Roommate constantly letting random men sleepover

One of my roommates has a major sex addiction. She brings home a new guy every weekend. Sometimes even 1 each night of the weekend (1-2). Me being a small 22 year old female makes me feel very anxious constantly having these men around. The thing that worries me is that she goes out to the clubs and gets so fucked up with no standards and picks up whatever man she can find who’s down to sleep with her. For me it triggers me because she knows nothing about these men and I’ve had bad past experiences with men that I feel unsafe. And she has them sleepover so it’s hard for me to sleep at night. Is this a big deal? Am I making it more of a big deal than it is? What do I do to ease my anxiety through this? I feel like I can’t just tell her who and who can cannot bring home but it’s scary for me.