Advice Please ? My BFF is very promiscuous & it's stressing me out while pregnant

ok I have a friend & we been best best friends for 6 years now & we both been thru some rough patches . unfortunately , her rough patches made her sexually promiscuous &I she just freely sleeps with guys without condoms 😒 . not to mention these guys treat her like shit - literally like a meat a piece . they can do her SO dirty but tell her anything she wants to her & bam - their back between her legs 😕 I have bad experiences with guys so I know how much of dogs & players guys can get just seem likes no matter what I tell her , she'll turn around & fall under some magic spell allowing these guys to do whatever they want to her . I care about her a lot & don't want her to catch something she can't get rid of because of those lying assholes 😶 what do I do ? (please no bad comments - this is still my friend)